Bug 509642: improve styling of menu buttons, r=enn

--HG--
extra : rebase_source : d01e66e2d927cfa5bb5b39ed619e45b5eaab8fa0

toolkit/themes/gnomestripe/global/button.css

@@ -153,6 +153,12 @@ button[type="menu-button"] {
   border: none;
 }
 
+.button-menubutton-button {
+  -moz-appearance: none;
+  background-color: transparent;
+  border: none;
+}
+
 .button-menu-dropmarker,
 .button-menubutton-dropmarker {
   -moz-appearance: toolbarbutton-dropdown !important;

toolkit/themes/pinstripe/global/button.css

@@ -79,6 +79,11 @@ button[type="menu-button"] {
   border: none;
 }
 
+.button-menubutton-button {
+  -moz-appearance: none;
+  margin: 0;
+}
+
 .button-menu-dropmarker,
 .button-menubutton-dropmarker {
   -moz-appearance: none !important;

toolkit/themes/winstripe/global/button.css

@@ -144,6 +144,12 @@ button[type="menu-button"] {
   border: none;
 }
 
+.button-menubutton-button {
+  -moz-appearance: none;
+  background-color: transparent;
+  border: none;
+}
+
 .button-menu-dropmarker,
 .button-menubutton-dropmarker {
   -moz-appearance: none !important;