Removing property that's causing unit tests to fail.

Author: larz0

src/styles/brackets_patterns_override.less

@@ -295,7 +295,6 @@ a:focus {
         // Offset for better alignment with button
         top: 34px;
         margin-top: 0;
-        margin-left: 1px;
 
         // Fix for #4593: don't let narrow parent (menubar item) cause text wrap at the float boundary between
         // the menu item label and keyboard shortcut. This takes away the "gotta get narrower" pressure.