[WIP] Status fetch

[alensiljak]

This Pull Request fixes/closes #1471.

It changes the following:

• adds the Fetch command to the status window

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

Comments

This is a WIP. Looking for feedback. Adding the Fetch command to the window was easy. Now, the Fetch popup has been designed to fetch all. This is what the current version is doing, hence the warning for unused branch string. It is possible:

• remove the branch string and keep fetch_all as the command
• implement the branch fetching in fetch_popup

What would you suggest?

[extrawurst]

you can install cargo deny: https://github.com/EmbarkStudios/cargo-deny

[alensiljak]

updated.

cargo deny check
advisories ok, bans ok, licenses ok, sources ok