LyX 2.3.0RC2: Bug in advanced search and replace

[Eric Barkan]

Under 2.3.0RC2, I find that the advanced search and replace pane does 
not respond to keyboard input.  The text cursor appears when I click on 
the pane, but I can't enter text directly into the pane or into a math 
box in the pane.  I do not find this problem in 2.3.0RC1.

I have built 2.3.0RC2 on Fedora 27 using both QT 5.9.2 and QT 4.8.7 and 
I have also installed it on a new Dell laptop using Windows 10 as well 
as on a win 10 virtual machine.  All of these installations show the 
same bug.

Now for the good news.  I'm a long time LyX user and I don't know how 
I'd live without it.  Thanks to everyone on the LyX team for your 
ongoing hard work.

Eric Barkan