improve study shortcut

[MorenoTropical]

Purpose / Description

If I open the study shortcut and the deck has no pending cards, the screen closes without any warning nor try to check if there are other decks to review

Fixes

• Fixes the issue above

Approach

It adds the deck picker to the task stack in the Study shorcut like the deck specific shortcuts already do

How Has This Been Tested?

two.mp4

one.mp4

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[BrayanDSO]

LGTM. Thanks