Paste from Word support in MS Edge

[Tade0]

This ticket gathers all the issues concerning Paste from Word support in Microsoft Edge.

• ticket:16682
• ticket:16745

Features that are broken in Edge(mostly because content is not recognized as pasted from Word):

• Background Color: All styles except the background color are removed.
• Lists(all kinds except flat ordered list): Always remain paragraphs, regardless of the pasting method.
• Image: src points to a url starting with file://.