Otherwise temporary changes to the previewNode will pollute the original
doc's model tree.
Bug: T121488
Change-Id: I6a6b3d904061b0ce6e0c513ad424aabc3c4472b5
This fixes some rendering issues, and also increases the font
size of reference contexts from 12.8px (interface) to 14px (content).
Bug: T119430
Change-Id: Ib1bae8cd4cfe86903d78406a33db78e1489fde86
An MWExtensionDialog with a PreviewElement for the selected node,
or node to insert.
Depends on Icd622e15cd7 in VE core.
Change-Id: Ia0f46da2d445dd94c8aa50be73508d9f1afcb816