[c12737] Implement some custom use for Effect Activate Object spells

This will fix the summoning events for the Wind Stones, Ice Stones, Skettis bosses and quest 11865

(based on commit [12538] - 91268f6)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>
[c12738] Update some Sunwell Plateau spells

Limit targets and allow positive effect for spell 46650
Implement effect for spells 46289 and 46637
Remove effect for spell 44845 - will be handled in script library

(based on commit [12539] - 1167ecf)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>