Bugfix and efficiency improvements

 * cut number of redraws when swapping AEGIS by half
 * fixed tooltip race condition that would cause tooltip events to become unresponsive
 * fixed flicker / blurred xp numbers when switching AEGIS, plus xp numbers should generally be clearer
 * swapped 4th and 6th Aegis token mapping for raw XP values in tooltips
 * improved efficiency of tooltip loading
 * fixed single-swapping Secondary AEGIS 1 or 2 sometimes causing entire GUI to disappear for a moment

 * brought AddonUtils package into AegisHUD namespace (code topic)