[fix] Fixed the selection of ranges of tickets while holding shift (1m)

The anchor of the range-selection shouldn't change when you hold Shift and click on tickets
[fix] Prevented the selection of resolved tickets in the Priority view (8m)
[fix] Stopped hiding tickets immediately when flagging them as unable-to-estimate (3m)
[skip] Removed special sorting from Estimate Effort view (1m)
[fix] Allowed the user to use the arrow keys to move past invisible rows in the Estimate Effort view (3m)