feat(settings): add a setting to disable bind mounts for non-admins (#1237)

* feat(settings): add a setting to disable bind mounts for non-admins

* refactor(gruntfile): remove temporary setting

api/bolt/migrate_dbversion4.go

@@ -0,0 +1,16 @@
+package bolt
+
+func (m *Migrator) updateSettingsToVersion5() error {
+	legacySettings, err := m.SettingsService.Settings()
+	if err != nil {
+		return err
+	}
+	legacySettings.AllowBindMountsForRegularUsers = true
+
+	err = m.SettingsService.StoreSettings(legacySettings)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}