feat: Use updated minimal NSColorWell style for Groups. (#5016)

* feat: Use updated minimal NSColorWell style for Groups.

Only on macOS Ventura (13.0+), as AppKit changes were introduced here.

Somewhat fixes #5011

Signed-off-by: Dzmitry Neviadomski <nevack.d@gmail.com>

macosx/CocoaCompatibility.h

@@ -37,4 +37,17 @@ typedef NS_ENUM(NSInteger, NSTableViewStyle) {
 
 #endif
 
+// Compatibility declarations to build `@available(macOS 13.0, *)` code with older Xcode 11.3.1 (the last 32-bit OS compatible Xcode)
+#ifndef __MAC_13_0
+
+typedef NS_ENUM(NSInteger, NSColorWellStyle) {
+    NSColorWellStyleMinimal = 1,
+} API_AVAILABLE(macos(13.0));
+
+@interface NSColorWell ()
+@property(assign) NSColorWellStyle colorWellStyle API_AVAILABLE(macos(13.0));
+@end
+
+#endif
+
 NS_ASSUME_NONNULL_END

macosx/GroupsPrefsController.mm

@@ -2,6 +2,8 @@
 // It may be used under the MIT (SPDX: MIT) license.
 // License text can be found in the licenses/ folder.
 
+#import "CocoaCompatibility.h"
+
 #import "GroupsPrefsController.h"
 #import "GroupsController.h"
 #import "ExpandedPathToPathTransformer.h"
@@ -41,6 +43,11 @@ - (void)awakeFromNib
 
     [self.fSelectedColorView addObserver:self forKeyPath:@"color" options:0 context:NULL];
 
+    if (@available(macOS 13.0, *))
+    {
+        self.fSelectedColorView.colorWellStyle = NSColorWellStyleMinimal;
+    }
+
     [self updateSelectedGroup];
 }