Missions (Garrison/Covenant) button position gets overwritten by Blizzard in Shadowlands

[0xjc]

The GarrisonLandingPageMinimapButton button (called "Missions" button in the config; in SL this is the Covenant Sanctum button) in 9.0 gets delayed SetPoint calls by Blizzard and reverts to a hardcoded anchor. As a result it doesn't appear in the correct place.

Offending FrameXML code:

• https://github.com/Gethe/wow-ui-source/blob/52aec7cc87492cedd71b54cd022c95b51af2fa50/FrameXML/Minimap.lua#L662
• Hardcoded value: https://github.com/Gethe/wow-ui-source/blob/52aec7cc87492cedd71b54cd022c95b51af2fa50/FrameXML/Minimap.lua#L622

Workaround is to post-hook GarrisonLandingPageMinimapButton_UpdateIcon to force it back:

hooksecurefunc("GarrisonLandingPageMinimapButton_UpdateIcon", function(self)
        self:ClearAllPoints()
        self:SetPoint(...)
end)