Sort all branches by last update

**Is your feature request related to a problem? Please describe.**

Showing recent branches is a great feature, but I often have trouble finding a fairly recent branch because it's disappeared from the short "Recent Branches" list.

**Describe the solution you'd like**

Divide the list of branches into "Local Branches" (sorted by date) and "Remote Branches" (sorted by date), instead of "Recent Branches" (sorted by date) and "Other Branches" (sorted alphabetically).

It's not very useful to have branches sorted alphabetically, as you can already type to filter them.

**Describe alternatives you've considered**

Switching to the command line and using a custom `git branches` alias:

```bash
for-each-ref --sort=committerdate refs/heads/ --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(color:red)%(objectname:short)%(color:reset) - %(contents:subject) - %(authorname) (%(color:green)%(committerdate:relative)%(color:reset))'
```

**Teachability, Documentation, Adoption, Migration Strategy**

This would replace the current dropdown list of branches.