Blootube-wide change to make dropdowns more readable

[anonymous]

Edit box and dropdown backgrounds are a rather dark blue. In the case of dropdowns, sometimes the text is white, but most times it is black. Black on a dark blue is difficult to read. This changes the edit box and dropdown backgrounds to be a lighter blue that contrasts well with both white and black text.

qtlook.txt 46c46 < str ActiveHighlight?=#0000F0 ---

str ActiveHighlight?=#0066FF

[Justin Hornsby]

(In [13943]) closes #3735 and #3736