Select time signature after changed

[randoguyname]

Time signatures are now selected after changed to allow for multiple successive modifications to time signature

Resolves: #9584

This change allows users to change a time signature multiple times in succession, like with key signatures or clefs.

• [x] I signed the CLA
• [x] The title of the PR describes the problem it addresses
• [x] Each commit's message describes its purpose and effects, and references the issue it resolves
• [x] If changes are extensive, there is a sequence of easily reviewable commits
• [x] The code in the PR follows the coding rules
• [x] There are no unnecessary changes
• [x] The code compiles and runs on my machine, preferably after each commit individually
• [ ] I created a unit test or vtest to verify the changes I made (if applicable)