Make it possible to select multiple old commit messages from log history
I often use the "Past last commit message" or "Paste recent message..." right click menu options in the commit dialog, in order to reuse an old commit message. But sometimes I find that I actually want to combine multiple old commit messages (often for the jira ticket IDs, then I rewrite the other part). Currently that is only possible by clicking "Paste recent message..." to open the Log History window, and then selecting an old message, and then repeating this multiple times.
My suggestion is that in this Log History window, one has the option to select multiple messages, using Ctrl click (to select/deselect individual ones) or Shift click (to select a range), just as in many other GUIs. And when the messages are inserted into the commit window, they could by default be separated by a newline character, or plus character.
This should give an added benefit to people who find this useful, while it should not cause any problems for other users (as long as they don't Ctrl or Shift click willy nilly).