Show loading indicator during git merge --continue

[deventon]

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

The git merge --continue handler when finishing resolving a merge conflict has no loading indicator. We're using pretty extensive git hooks including a precommit hook that can run for quite some time when staging dozens of files (which happens in a master merge).

Describe the solution you'd like

Some kind of loading indicator / console output would be enough. Right now I press Enter when the popup 'All changes resolved. Do you wish to continue the merge?' appears and nothing visible happens. Always looks like lazygit crashed. The same is true to a lesser extent with commits in general, but at least in this case there is something happening in the bottom left corner.

[TimShilov]

Seems like a duplicate of #3635