fix: add retry and show warning on description saving error (#7070)

Signed-off-by: Luka Trovic <luka@nextcloud.com>

src/store/main.js

@@ -50,6 +50,7 @@ export default new Vuex.Store({
 		sidebarShown: false,
 		currentBoard: null,
 		currentCard: null,
+		hasCardSaveError: false,
 		boards: loadState('deck', 'initialBoards', []),
 		sharees: [],
 		assignableUsers: [],
@@ -131,6 +132,9 @@ export default new Vuex.Store({
 		setFullApp(state, isFullApp) {
 			Vue.set(state, 'isFullApp', isFullApp)
 		},
+		setHasCardSaveError(state, hasCardSaveError) {
+			Vue.set(state, 'hasCardSaveError', hasCardSaveError)
+		},
 		SET_CONFIG(state, { key, value }) {
 			const [scope, id, configKey] = key.split(':', 3)
 			let indexExisting = -1