Unit frames should start with proper values rather than showing false damage/healing events.

[codecorsair]

sysrage: Currently,** when selecting a new unit, the unit frames incorrectly show damage or healing events (animations, bar updates, etc.). When first selecting a unit, none of these events should occur. The unit frame should just show the correct initial state.

https://forums.camelotunchained.com/topic/14821-false-damage-display/

[codecorsair]

This is temporary until we get the combat events passed to the client. This is something @Rob7045713 is working on currently. Once he's got that done, we'll have a task to make the events fire off of these rather than simply off of health value changes.