Refresh repo button

[nettnikl]

Hi,

when first testing the software i opened an empty repository. The software correctly showed me an error that there was no content. Then i created a snapshot and wanted to refresh - however i had to click on open repository and "okay" again.

However, i think it would be good for the UX to allow a user to retry/refresh the repo data. No big deal, but if there is no "auto reload" on changes (which could also be considered for local repos), a refresh button would reduce 2 clicks to 1 in a situation where there is space in the UI and the expectation that the user would just want to retry.

This would also benefit the main view, where you might also want to see brand new snapshots.