Fix double reloading on sync in tablet mode

I just realized that it won't make much sense to keep that statement as the activity is reloaded anyway after dismissing the dialog. Therefore, setting the current deck should be enough, and this happens as part of the sync anyway. The statement actually does the opposite of what I thought: it keeps the currently selected deck the same even after the sync. So I'll remove `currDid` to be more in line with Anki Desktop.