Idea: Don't pre-fill pull request title with branch name

[silverwind]

Feature Description

When opening a pull request from a branch that has more than 1 commit, the UI will pre-fill the pull request form's title with the branch name. This is consistent with Github (except Github transforms/capitalizes the branch name), but I think it's a bad mechanism because novice users will often not change the title at all, maybe thinking it has to be that way. I think better behaviour would be either:

• Use the title from the first commit.
• Don't fill the title at all, require the user to write it.

Also btw, we should autofocus the title field when the form shows, like GitHub also does.