Merge pull request #810 from ychin/yosemite-tab-close-button-on-hover

Make pre-Mojave tabs also show the close button on hover over tab

Author: ychin

src/MacVim/PSMTabBarControl/source/PSMYosemiteTabStyle.m

@@ -381,6 +381,7 @@ - (void)drawInteriorWithTabCell:(PSMTabBarCell *)cell inView:(NSView*)controlVie
         NSRect closeButtonRect = [cell closeButtonRectForFrame:cellFrame];
         NSImage *button = nil;
 
+        if ([cell isHighlighted]) button = closeButton;
         if ([cell closeButtonOver]) button = closeButtonOver;
         if ([cell closeButtonPressed]) button = closeButtonDown;