change the text in the preview button to “edit”, when the preview is shown (BB-6181)

Issue #4840 resolved
Arne Babenhauserheide
created an issue

Reason: I just wanted to ask: “How to get out of a preview in a comment here?”

Then I found: “Ah, clicking preview again… might be useful to change the text in the preview button to “edit”, when the preview is shown.”