Keep autocomplete custom field dropdowns visible during search in inline edit

This commit addresses an inline edit issue on the ticket list.

Previously, all children of inline editor form with "loading" class
were hidden, which inadvertently included TomSelect dropdowns used in
autocomplete custom fields: they can also have a "loading" class when
updating options in response to your search string.

Author: sunnavy

share/static/css/elevator/inline-edit.css

@@ -69,14 +69,17 @@ div.editable.loading>form.editor>.cancel {
     display: none;
 }
 
-div.editable.loading>form.editor>.loading {
+/* .spinner-border avoids conflicts with other .loading elements.
+   E.g. TomSelect elements have .loading while a remote search is in progress. */
+
+div.editable.loading>form.editor>.loading.spinner-border {
     display: flex;
     margin-top: 0.5em;
     margin-left: 0.5em;
     padding: 0.5em;
 }
 
-div.editable>form.editor>.loading {
+div.editable>form.editor>.loading.spinner-border {
     display: none;
 }