only enforce minimum button size when a non empty text is passed to Pushbutton SizeFromContents

kstyle/breezestyle.cpp

@@ -2334,7 +2334,8 @@ namespace Breeze
         }
 
         // make sure buttons have a minimum width
-        size.rwidth() = qMax( size.rwidth(), int( Metrics::Button_MinWidth ) );
+        if( !buttonOption->text.isEmpty() )
+        { size.rwidth() = qMax( size.rwidth(), int( Metrics::Button_MinWidth ) ); }
 
         // finally add margins
         return flat ? size : expandSize( size, Metrics::Frame_FrameWidth );