I use a laptop with touchscreen, ctrl and shift keys do no effect to select items using toushcreen

Reproducible: Always

Steps to Reproduce:
1. open dolphin and press ctrl to select random items
2. or press shift to select items in sequence
3.

Actual Results:  
selection is undone when user selects the second item while press ctrl or shift key

Expected Results:  
random selection must work when I press ctrl and selection in sequence must work when I press shift