Open Find / Replace dialog in the current space.

Set the window's collection behavior to include NSWindowCollectionBehaviorMoveToActiveSpace.

This tells macOS to always show the Find dialog in the current active space
(the one where you press Command+F) rather than following the application to
another space.

Resolves #1629

Author: xwmx

src/MacVim/MMFindReplaceController.m

@@ -31,6 +31,12 @@ - (void)showWithText:(NSString *)text flags:(int)flags
     // Ensure that the window has been loaded by calling this first.
     NSWindow *window = [self window];
 
+    // Set collection behavior to ensure the dialog appears in the current
+    // space rather than jumping to another space.
+    NSWindowCollectionBehavior wcb = window.collectionBehavior;
+    wcb |= NSWindowCollectionBehaviorMoveToActiveSpace;
+    [window setCollectionBehavior:wcb];
+
     if (text && [text length] > 0)
         [findBox setStringValue:text];