Refactor mouseover extensions to split initialization into two phases: OnLoad (empty) and OnAddOnLoad (actual setup). This ensures hooks are only registered when the target addon's globals are defined. Add guard clauses to check for required functions before hooking. Also remove Cursive's premature initialization attempt.
Replace hand-rolled ADDON_LOADED/PLAYER_LOGIN handlers with
EventUtil.ContinueOnAddOnLoaded / ContinueOnPlayerLogin, which fire
immediately if the event already happened -- removing the "we loaded before
the target addon and missed its ADDON_LOADED" workarounds.
- pfUI compat: ContinueOnAddOnLoaded("pfUI") + ContinueOnPlayerLogin; drops
the missed-event fallback (login path still re-runs SetupCompatibility).
- MacroErrorUI / MacroLengthWarn: ContinueOnAddOnLoaded("Blizzard_MacroUI"),
folding their manual "already loaded" checks.
- 9 Mouseover extensions (ag_UnitFrames, CT_RaidAssist, CT_UnitFrames,
DiscordUnitFrames, Grid, NotGrid, Cursive, sRaidFrames, PerfectRaid):
ContinueOnAddOnLoaded("<AddonName>", OnLoad). Since immediate-fire passes no
event args, the old `arg1 == "X"` checks are replaced by the addon-name gate
(global guards kept where present); also removes the buggy
UnregisterEvent("ADDON_LOADED", "Onload") no-ops that never fired.
Addon names match file names; drops support for renamed folders (e.g. -master).
Brues