Transparency click-through broken on 0.42.4

[Blatman]

OSX 10.13.6 High Sierra
Regression - click through not working - is OK with 0.41.3

TransTest-simple.zip

Update: also noticed that since c. 0.34 onwards if frame: "false" exists in manifest then click/right-click is disabled eg: in attached test app if frame false is removed then right-click on the blue area (non-transparent) will give a context menu - this should also happen with frame set to false (maybe this should be a separate bug)
EDIT: don't worry about the Update: note - this is linked in with the drag/user select css settings so the only issue is the click-through

[rogerwang]

CC @jtg-gg will you be free to check this? I didn't notice any rebase confilicts on this when upgrading from Chromium 77 to 78.

[jtg-gg]

I've done some checking, the code looks ok, not sure why the click-through doesn't work

[jtg-gg]

finally, after comparing the codes
@rogerwang please accept my pull request, and also merge to nw43

[rogerwang]

great. Thanks!

[rogerwang]

This is fixed in git and will be available in the next nightly build.