Hide the edit/add buttons for fields the user can't update

Currently the /registrar-settings backend endpoint will fail to update any
OWNER fields that a non-OWNER tries to change.

However, the front-end (soy, js) still allow non-OWNERs to try and change
these fields (there's the "edit" or "add" button, and it only fails when you try to "save")

This CL changes the front-end to remove the ability for non-OWNERs to even try
and change these fields. However, it will still let them *view* these fields as
it has interesting and important information.

-------------------------------

In addition - it changes the webdriver tests to include the "edit buttons". Those were never tested before, and now we will test to see if they are indeed displayed or not.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=223845883

java/google/registry/ui/soy/Console.soy

@@ -102,27 +102,25 @@
 
 /** Appbar add/back, edit/cancel appbar. */
 {template .appbarButtons}
-  <div id="reg-app-buttons" class="{css('kd-buttonbar')} {css('left')}">
-    <button id="reg-app-btn-add"
+  <button id="reg-app-btn-add"
+          type="button"
+          class="{css('kd-button')} {css('kd-button-submit')} {css('hidden')}">
+    Add</button>
+  <div id="reg-app-btns-edit" class="{css('hidden')}">
+    <button id="reg-app-btn-edit"
             type="button"
-            class="{css('kd-button')} {css('kd-button-submit')} {css('hidden')}">
-      Add</button>
-    <div id="reg-app-btns-edit" class="{css('hidden')}">
-      <button id="reg-app-btn-edit"
-              type="button"
-              class="{css('kd-button')} {css('kd-button-submit')}">
-        Edit</button>
-      <button id="reg-app-btn-back" type="button" class="{css('kd-button')}">
-        Back</button>
-    </div>
-    <div id="reg-app-btns-save" class="{css('hidden')}">
-      <button id="reg-app-btn-save"
-              type="button"
-              class="{css('kd-button')} {css('kd-button-submit')}">
-        Save</button>
-      <button id="reg-app-btn-cancel" type="button" class="{css('kd-button')}">
-        Cancel</button>
-    </div>
+            class="{css('kd-button')} {css('kd-button-submit')}">
+      Edit</button>
+    <button id="reg-app-btn-back" type="button" class="{css('kd-button')}">
+      Back</button>
+  </div>
+  <div id="reg-app-btns-save" class="{css('hidden')}">
+    <button id="reg-app-btn-save"
+            type="button"
+            class="{css('kd-button')} {css('kd-button-submit')}">
+      Save</button>
+    <button id="reg-app-btn-cancel" type="button" class="{css('kd-button')}">
+      Cancel</button>
   </div>
 {/template}