Issue/876/merge branch closes window

[andrewpollack]

This Pull Request fixes/closes #{876}.

It changes the following:

• Changed merge_branch function to take self as a mutable pointer.
• Added self.hide(); between merging of branch and push to queue to update.

I followed the checklist:

• I added unittests
• I ran make check without errors
• I tested the overall application
• I added an appropriate item to the changelog

[extrawurst]

one round of general GitHub markdown feedback:

This Pull Request fixes/closes #{876}.

if you remove the curly braces, it becomes a nicely clickable link

• [N/A] I added unittests

just leaving it empty [ ] renders a nice unchecked checkbox

• [ ✔️ ] I ran make check without errors

just making it [x] renders a checked checkbox.
please use the preview tab to check if you used the GitHub markdown correctly

[extrawurst]

@andrewpollack is this up to date with master? I cannot rebase-merge it

[andrewpollack]

@andrewpollack is this up to date with master? I cannot rebase-merge it

Looks like a few commits merged in between PR and now -- I've updated and now it's up-to-date with master

[andrewpollack]

one round of general GitHub markdown feedback:

This Pull Request fixes/closes #{876}.

if you remove the curly braces, it becomes a nicely clickable link

• [N/A] I added unittests

just leaving it empty [ ] renders a nice unchecked checkbox

• [ heavy_check_mark ] I ran make check without errors

just making it [x] renders a checked checkbox.
please use the preview tab to check if you used the GitHub markdown correctly

Thank you!! I edited the original with this feedback