LEAF 4626 - Form Editor drag-drop fix for Firefox browser, CSS fixes #2634
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Adds a fix to drag drop behavior for Firefox browser.
Expression fix is a recommendation from online sources to address issues with a long-standing Firefox bug. It is mostly taken as-is and only runs if the Form Editor is created when using Firefox.
Other (uncovered during update)
Add CSS specificity fix for form li elements intended for drag-drop to address unintended styling of lists in question names and form questions that are in preview mode.
HTML update to form browser tables (add explicit thead and tbody) and one of its img elements (add explicit height) to address console warnings.
Impact / Testing
Form Editor Drag-Drop functionality, Firefox Browser.
Form Editor Drag-Drop should work as expected when using Firefox.
Other
Form Editor related tests pass.
Form Editor
-Lists in question names display as expected on form Editing and Preview modes
-Form Questions display as expected in preview mode