Black background in file window
Background of the file window is rendered black. It probably happens only for large files.
(1) After loading the files into Meld, the background is black
(2) After skipping to the first difference (Alt + Down), the background is white (as it should be)
(3) After skipping to the next difference (Alt + Down), the background is black again
(4) After scrolling to the boundary between the black and normal blocks, clicking and/or moving the cursor results in weird effects (either "restoring" the black lines to normal state or "blacking" normal lines)
OS: Fedora 33 w/ GNOME 3.38.5
Meld: 3.21.0 (meld-3.21.0-5.fc33), text filters are off
Test Case Files: out_M_ecb.txt-1 out_M_ecb.txt-2