cocoa: Use macOS 26.x mouse workaround for all windows, not just fullscreen.

This is a temporary workaround until we understand the issue better.

Reference Issue #15967.

src/video/cocoa/SDL_cocoawindow.m

@@ -1920,16 +1920,19 @@ static void Cocoa_SendMouseButtonClicks(SDL_Mouse *mouse, NSEvent *theEvent, SDL
     y = (window->h - point.y);
 
     // On macOS 26 if you move away from a space and then back, mouse motion events will have incorrect
-    // values at the top of the screen. The global mouse position query is still correct, so we'll fall
-    // back to that until this is fixed by Apple. Mouse button events are interestingly not affected.
+    // values at the top of the screen. Apparently non-fullscreen windows suffer from this from time
+    // to time when mouse leaves/enters a window and/or focus changes, too. The global mouse position query
+    // is still correct, so we'll fall back to that until this is fixed by Apple. Mouse button events are
+    // interestingly not affected.
     if (@available(macOS 26.0, *)) {
-        if ([_data.listener isInFullscreenSpace]) {
+        // do for all windows for now, not just fullscreen spaces. And hopefully remove this code entirely soon.
+        //if ([_data.listener isInFullscreenSpace]) {
             int posx = 0, posy = 0;
             SDL_GetWindowPosition(window, &posx, &posy);
             SDL_GetGlobalMouseState(&x, &y);
             x -= posx;
             y -= posy;
-        }
+        //}
     }
 
     if (NSAppKitVersionNumber >= NSAppKitVersionNumber10_13_2) {