Correct description in messages; add 'tel' input type

go-back-with-backspace/is_editable.js

 // Determine whether focus is in an editable text field.
 function isEditable(path) {
   var target = path[0];
 
   // Elements may be explicitly marked as editable.
   if (target.isContentEditable)
     return true;
 
   // Several types of input fields are editable, but not all (e.g., checkboxes).
   var nodeName = target.nodeName;
   var nodeType = target.type;
   if (nodeName === 'TEXTAREA' ||
       (nodeName === 'INPUT' && (nodeType === 'text' ||
                                 nodeType === 'email' ||
                                 nodeType === 'number' ||
                                 nodeType === 'password' ||
-                                nodeType === 'search'))) {
+                                nodeType === 'search' ||
+                                nodeType === 'tel'))) {
     return true;
   }
 
   // Certain CSS styles, on elements or their parents, also indicate editable
   // fields.
   var pathLength = path.length;
   for (var i = 0; i < pathLength; ++i) {
     target = path[i];
     if (target.nodeType == 1) { // Only Elements have computed styles.
       var userModify = getComputedStyle(path[i])['-webkit-user-select'];
       if (userModify == 'read-write' || userModify == 'write-only')
         return true;
     }
   }
   return false;
 }