Run once at the first start, showing all the app features. After first run, store value, that intro has been done.
Show pop-up with the list of all features and option to skip begginer intro/tutorial.
When switching from other language and there is no translation for this language, previous language translation is applied for the specific element. This leads to the situation when user left with incorrect translation. It is better to check if translation is present and if not, apply default translation (e.g. english), which should be present any time.
It is better to test if all localization elements mentioned in localization file object have translation for the default language (e.g. english) and do not allow pass the test or log a warning about it.
Having default translations enhance user experience and make more fault tolerant application.
Deletes all added cards (of all types), without deletion of other app information.
To think about: button to delete all cards.
Place it somewhere on top of the content somewhere near the top of the tasks list or bottom of the submit form.