Textfields require two clicks to edit

[martinleopold]

Tested with: branch master (f40361e)

Textfields require two clicks to edit when clicking on the placeholder text. This applies to the search field and the annotation text boxes. To reproduce:

• reset to sample project
• in the search field click on the placeholder text "Search..."
• "Search..." disappears but there is no typing cursor. another click is needed to type
• same issue happens with empty annotation boxes: In the second annotation from the top (00:00:06.736) click onto the placeholder text "(Text, optional)"