d0cc1f6df740e03ca0213a3754c3277b01ae2c05 qt: Disable toolbar when overlay is shown (Hennadii Stepanov)
e74cd2083d579b14b0b718aa36796f2bcf679600 qt, refactor: Cleanup ModalOverlay slots (Hennadii Stepanov)
Pull request description:
Keeping the main window toolbar activated while the modal overlay is shown could create the appearance of the non-responsive GUI.
Fixes#22.
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On master (ca055885c631de8ac0ffe24be6b02835dbcc039d):

With this PR:

ACKs for top commit:
harding:
Tested ACK d0cc1f6df740e03ca0213a3754c3277b01ae2c05. Tested on Linux/X11 as much as I could given it's a pretty small change; seems like a nice improvement. I'm not experienced in Qt, but I don't see anything obviously problematic about the code.
jonatack:
ACK d0cc1f6 tested on Debian 5.7.6-1 (2020-06-24) x86_64 GNU/Linux
LarryRuane:
ACK d0cc1f6df740e03ca0213a3754c3277b01ae2c05 tested on Ubuntu 18.04.4 LTS
Tree-SHA512: e371b34231c01e77118deb100e0f280ba1cdef54e317f7f7d6ac322598bda811bd1bfe3035e90d87f8267f4f5d2095d34a8136911159db63694fd1b1b11335a1