Merge pull request #4576 from bubblobill/css_fix

Added missing colon in button CSS

Author: cwisniew

src/main/resources/net/rptools/maptool/library/builtin/mt-theme-css.hbs

@@ -160,7 +160,7 @@ button::after,
   left: 0;
   width: 100%;
   height: 100%;
-  padding 1px;
+  padding: 1px;
   content: "";
   border-radius: .15em;
   background: linear-gradient(