Forever 1.60.x: totem recall and summon tooltip workaround (1.1.0)

Only the MultiCastRecallSpellButton and MultiCastSummonSpellButton hover tooltips
and their refresh callbacks are guarded. If spellId is absent or invalid, no
tooltip is requested. Valid spells
use the existing Blizzard tooltip handlers. Click scripts, secure attributes,
spell data, and global tooltip APIs are not replaced.

This does not teach or repair missing totem spells. It prevents the reported
invalid tooltip request. Re-test after beta updates; disable this addon if the
underlying Blizzard bug is fixed.

Install ONLY in _classic_beta_/Interface/AddOns/ForeverTooltipFix.
No Anniversary files or SavedVariables are changed. A version guard also exits
without changes on clients outside version 1.60.x.

After installation, restart WoW if the new addon is not discovered by /reload.
Test hovering both buttons before and after their spells are available,
and verify that clicking the button still works normally. In-game testing is
required; it has not been performed by this patch's author.

To undo: disable Forever Tooltip Fix in the beta client's AddOns list and reload.
