fix(tui): alerts are cleared on next repo update

Closes kemitix/git-next#151

crates/cli/src/tui/actor/handlers/server_update.rs

@@ -34,6 +34,7 @@ impl Handler<ServerUpdate> for Tui {
                     let Some(repo_state) = forge_state.repos.get_mut(&repo_alias) else {
                         return;
                     };
+                    repo_state.clear_alert();
                     match repo_update {
                         RepoUpdate::Branches { branches } => {
                             repo_state.update_branches(branches);