Bug 1563115 - Follow-up: Restore class textbox-input for menulists to prevent affecting all inputs nested in a menulist. r=mkmelin

mail/base/content/mailWidgets.js

@@ -750,7 +750,7 @@
         // hide these nodes from the accessibility tree.
         return document.importNode(
           MozXULElement.parseXULToFragment(`
-            <html:input type="text" class="menulist-input" allowevents="true"/>
+            <html:input type="text" class="menulist-input textbox-input" allowevents="true"/>
             <hbox class="menulist-label-box" flex="1" role="none">
               <image class="menulist-icon" role="none"/>
               <label class="menulist-label"

mail/base/content/menulist.css

@@ -14,12 +14,12 @@ menulist > html|input {
   margin: 0;
 }
 
-menulist html|input {
-  -moz-appearance: none !important;
-  background: transparent !important;
+menulist html|*.textbox-input {
+  -moz-appearance: none;
+  background: transparent;
   -moz-box-flex: 1;
-  margin: 0 !important;
-  border: none !important;
-  padding: 0 !important;
+  margin: 0;
+  border: none;
+  padding: 0;
   font: inherit;
 }