Fix form plugin for input fields.

It turns out input[type=text] will only find input fields where
the type attribute is explicitly set to text, but would skip
fields that left it out and defaulted to type text. This changes
to catch all types of input elements.

src/plugins/form/form.js

@@ -32,7 +32,7 @@
         api = event.detail.api;
         var gc = api.lib.gc;
 
-        var selectors = [ "input[type=text]", "textarea", "select", "[contenteditable=true]" ];
+        var selectors = [ "input", "textarea", "select", "[contenteditable=true]" ];
         for ( var selector of selectors ) {
             var elements = document.querySelectorAll( selector );
             if ( !elements ) {