Using issue tracker instead of built-in supported commit web link is based on the following reasons
* repo may have multiple remotes
* it is not good to open an context menu to choose which web to visit with multiple remotes
* some remote servers are not supported by this app
* add missing translations and it's no need to add `OnPull` suffix since it already has a prefix `Text.Pull.`
* when enable fetching all branches of selected remote, use merge/rebase command instead of pull
* re-arrange orders of options in pull popup panel
* default enable `Fetch all branches`
