Clean up org pages layout (#37445)

1. Fix overview sidebar regression
2. Remove unnecessary classes and styles
3. Fix "org invite" page

routers/web/org/teams.go

@@ -609,6 +609,8 @@ func DeleteTeam(ctx *context.Context) {
 // TeamInvite renders the team invite page
 func TeamInvite(ctx *context.Context) {
 	invite, org, team, inviter, err := getTeamInviteFromContext(ctx)
+	// TODO: to quickly debug the UI, can uncomment this (don't worry, it won't pass CI lint)
+	// invite, org, team, inviter, err = &org_model.TeamInvite{}, &org_model.Organization{}, &org_model.Team{}, ctx.Doer, nil
 	if err != nil {
 		if org_model.IsErrTeamInviteNotFound(err) {
 			ctx.NotFound(err)