Fix broken preference pane sizing when sparkle disabled

The recent change that added smooth resizing changed the alignment for
the General preference pane from bottom to top aligned as it never made
sense to be bottom aligned. However, there was code in in the preference
controller to correct for that when resizing the pane when sparkle is
disabled, which caused the resizing to not work. Fix that to account for
the top alignment instead of bottom.

Fix #1281

src/MacVim/MMPreferenceController.m

@@ -26,11 +26,6 @@
     NSRect frame = generalPreferences.frame;
     frame.size.height -= sparkleHeight;
     generalPreferences.frame = frame;
-    for (NSView *subview in generalPreferences.subviews) {
-        frame = subview.frame;
-        frame.origin.y -= sparkleHeight;
-        subview.frame = frame;
-    }
 #endif
     [super windowDidLoad];