Please give SmartGit 19.2 preview 2 a try.

Ctrl+Enter should do it - like any default button in any dialog.

We wont support floating views.

I reckon, you mean 1 to 4 spaces.

Feel free to modify the command in the Tools section of the preferences.

Onto what in the Branches view you want to drop the dragged commit? Maybe a screenshot sent to smartgit@syntevo.com helps me to better understand what you want.

If it is about just 1 commit, why not use Cherry-pick?

Please explain what exact rebase you wanted to start? A long scroll shouldn't be necessary.

It is not desireable to show arbitrary long amount of data in a table cell.

No, because this would mean to re-add and continue to maintain the old behavior.