Fix Table edit plugin anchorContainerSelector query #2499
Merged
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Description:
The anchor container functionality was unusable by all Table edit plugin features due to the use of getDOMHelper().queryElements() on TableEditPlugin, as it was looking for the anchor container inside the editor when it is expected to always be outside of it.
Fix
Use getDocument().querySelector() as it will fetch the anchor container from outside the editor. Test cases were added to cover this functionality.