FIX: In find file dialog, remove conflicting keyboard accelerator "F" key from the "Selected directories and files" to let it to the more important "File mask".

FIX: Still in find file dialog, remove conflicting keyboard accelerator "E" key from the "Regular expression" to let it to the "Excluded files" that was used anyway since almost 7 years.
ADD: Still in find file dialog, add keyboard accelerator "U" key for the "Regular expression".
ADD: Still in find file dialog, add keyboard accelerator "M" key for the "Hexadecimal".
FIX: If nothing was selecting when launching the find file dialog, the "Selected directories and files" option was disabled. But we could accidentally re-enable it by toggling back and forth "Opened tabs" option. This has been fixed.

src/fFindDlg.lfm

@@ -193,7 +193,7 @@ object frmFindDlg: TfrmFindDlg
             Width = 169
             Anchors = [akRight, akBottom]
             BorderSpacing.Right = 6
-            Caption = 'Selected directories and &files'
+            Caption = 'Selected directories and files'
             OnChange = cbSelectedFilesChange
             TabOrder = 4
           end
@@ -504,7 +504,7 @@ object frmFindDlg: TfrmFindDlg
             Top = 55
             Width = 118
             BorderSpacing.Left = 12
-            Caption = 'Regular &expression'
+            Caption = 'Reg&ular expression'
             OnChange = cbTextRegExpChange
             TabOrder = 5
           end
@@ -516,7 +516,7 @@ object frmFindDlg: TfrmFindDlg
             Height = 19
             Top = 79
             Width = 88
-            Caption = 'Hexadecimal'
+            Caption = 'Hexadeci&mal'
             OnChange = chkHexChange
             TabOrder = 7
           end

src/fFindDlg.lrj

@@ -7,7 +7,7 @@
 {"hash":49163891,"name":"tfrmfinddlg.lblexcludedirectories.caption","sourcebytes":[69,38,120,99,108,117,100,101,32,115,117,98,100,105,114,101,99,116,111,114,105,101,115],"value":"E&xclude subdirectories"},
 {"hash":40753218,"name":"tfrmfinddlg.cmbexcludedirectories.hint","sourcebytes":[69,110,116,101,114,32,100,105,114,101,99,116,111,114,105,101,115,32,110,97,109,101,115,32,116,104,97,116,32,115,104,111,117,108,100,32,98,101,32,101,120,99,108,117,100,101,100,32,102,114,111,109,32,115,101,97,114,99,104,32,115,101,112,97,114,97,116,101,100,32,119,105,116,104,32,34,59,34],"value":"Enter directories names that should be excluded from search separated with \";\""},
 {"hash":201746570,"name":"tfrmfinddlg.lblsearchdepth.caption","sourcebytes":[83,101,97,114,99,104,32,115,117,38,98,100,105,114,101,99,116,111,114,105,101,115,58],"value":"Search su&bdirectories:"},
-{"hash":127255587,"name":"tfrmfinddlg.cbselectedfiles.caption","sourcebytes":[83,101,108,101,99,116,101,100,32,100,105,114,101,99,116,111,114,105,101,115,32,97,110,100,32,38,102,105,108,101,115],"value":"Selected directories and &files"},
+{"hash":238646947,"name":"tfrmfinddlg.cbselectedfiles.caption","sourcebytes":[83,101,108,101,99,116,101,100,32,100,105,114,101,99,116,111,114,105,101,115,32,97,110,100,32,102,105,108,101,115],"value":"Selected directories and files"},
 {"hash":187812819,"name":"tfrmfinddlg.cbopenedtabs.caption","sourcebytes":[79,112,101,110,101,100,32,116,97,98,115],"value":"Opened tabs"},
 {"hash":5046979,"name":"tfrmfinddlg.gbfiles.caption","sourcebytes":[70,105,108,101,115],"value":"Files"},
 {"hash":41260443,"name":"tfrmfinddlg.lblfindfilemask.caption","sourcebytes":[38,70,105,108,101,32,109,97,115,107],"value":"&File mask"},
@@ -23,8 +23,8 @@
 {"hash":22868708,"name":"tfrmfinddlg.cbnotcontainingtext.caption","sourcebytes":[70,105,110,100,32,102,105,108,101,115,32,78,38,79,84,32,99,111,110,116,97,105,110,105,110,103,32,116,104,101,32,116,101,120,116],"value":"Find files N&OT containing the text"},
 {"hash":125468773,"name":"tfrmfinddlg.cbfindtext.caption","sourcebytes":[70,105,110,100,32,38,116,101,120,116,32,105,110,32,102,105,108,101],"value":"Find &text in file"},
 {"hash":35720169,"name":"tfrmfinddlg.cbreplacetext.caption","sourcebytes":[82,101,38,112,108,97,99,101,32,98,121],"value":"Re&place by"},
-{"hash":72913918,"name":"tfrmfinddlg.cbtextregexp.caption","sourcebytes":[82,101,103,117,108,97,114,32,38,101,120,112,114,101,115,115,105,111,110],"value":"Regular &expression"},
-{"hash":183979276,"name":"tfrmfinddlg.chkhex.caption","sourcebytes":[72,101,120,97,100,101,99,105,109,97,108],"value":"Hexadecimal"},
+{"hash":137727326,"name":"tfrmfinddlg.cbtextregexp.caption","sourcebytes":[82,101,103,38,117,108,97,114,32,101,120,112,114,101,115,115,105,111,110],"value":"Reg&ular expression"},
+{"hash":259470556,"name":"tfrmfinddlg.chkhex.caption","sourcebytes":[72,101,120,97,100,101,99,105,38,109,97,108],"value":"Hexadeci&mal"},
 {"hash":197676484,"name":"tfrmfinddlg.tsadvanced.caption","sourcebytes":[65,100,118,97,110,99,101,100],"value":"Advanced"},
 {"hash":122109610,"name":"tfrmfinddlg.cbdatefrom.caption","sourcebytes":[38,68,97,116,101,32,102,114,111,109,58],"value":"&Date from:"},
 {"hash":34324922,"name":"tfrmfinddlg.cbnotolderthan.caption","sourcebytes":[78,38,111,116,32,111,108,100,101,114,32,116,104,97,110,58],"value":"N&ot older than:"},

src/fFindDlg.pas

@@ -972,7 +972,7 @@ end;
 { TfrmFindDlg.cbOpenedTabsChange }
 procedure TfrmFindDlg.cbOpenedTabsChange(Sender: TObject);
 begin
-  cbSelectedFiles.Enabled := not cbOpenedTabs.Checked;
+  cbSelectedFiles.Enabled := not cbOpenedTabs.Checked AND (FSelectedFiles.Count > 0);
   cbFollowSymLinks.Enabled := not cbOpenedTabs.Checked;
   cmbFindPathStart.Enabled := not cbOpenedTabs.Checked;
 end;