Revert erroneous and unreviewed change to min-width value for small toolbars. Sorry for messing up!

calendar/base/themes/pinstripe/calendar-toolbar.css

@@ -67,7 +67,6 @@ toolbar[mode="full"] .cal-toolbarbutton-1 {
 
 toolbar[iconsize="small"] .cal-toolbarbutton-1 {
     -moz-box-orient: vertical;
-    min-width: 0px;
     list-style-image: url("chrome://calendar/skin/toolbar-small.png");
 }
 

calendar/base/themes/winstripe/calendar-toolbar.css

@@ -67,7 +67,6 @@ toolbar[mode="full"] .cal-toolbarbutton-1 {
 
 toolbar[iconsize="small"] .cal-toolbarbutton-1 {
     -moz-box-orient: vertical;
-    min-width: 0px;
     list-style-image: url("chrome://calendar/skin/toolbar-small.png");
 }