Fix 64225, which caused 64138 and other annoyances. r=jag sr=hyatt

xpfe/global/resources/content/radioBindings.xml

@@ -81,12 +81,20 @@
       </method>
     </implementation>
     <handlers>
-      <handler event="command">
+      <handler event="click" button="1">
         <![CDATA[
-          if (event.target.localName == "radio")
-            this.selectedItem = event.target;
+            if (event.target.localName == "radio" && !event.target.disabled)
+              this.selectedItem = event.target;
+
          ]]>
       </handler>
+      <handler event="keypress" key=" ">
+        <![CDATA[
+            if (event.target.localName == "radio" && !event.target.disabled)
+              this.selectedItem = event.target;
+
+        ]]>
+      </handler>
      
       <!-- keyboard navigation -->
       <!-- Here's how keyboard navigation works in radio groups on Windows:

xpfe/global/resources/content/xulBindings.xml

@@ -156,7 +156,8 @@
                                          if (v == 'true') return true; return false;"/>
     </implementation>
     <handlers>
-      <handler event="command" action="this.checked = !this.checked;"/>
+      <handler event="click" button="1" action="this.checked = !this.checked;"/>
+      <handler event="keypress" key=" " action="this.checked = !this.checked;"/>
     </handlers>
   </binding>