Allow mages to refresh Living Bomb (#3228)
Allow mages to refresh Living Bomb (#3228)

Currently, mages can't refresh Living Bomb if the target already have the dot.

###How to reproduce the issue :
1. Use Living Bomb on a target
2. Try to re-use Living Bomb on the same target
3. Observe the error message

###Expected Blizzlike behaviour
Living Bomb should be reapplyable 

###Why this PR : 
This PR allow to refresh the duration of Living Bomb on the same target

I've didn't found a bad mage's video that refreshes Living Bomb on his target, but found some Fire Mage 3.3.5 guides that mentions : 
"Never refresh your LB (Living Bomb) before the explosion (except if I clearly tell you to)."
https://sites.google.com/site/pvemage335/fire/rotation-gameplay

"Living Bomb – every 12 seconds **after the explosion**"
https://www.gnarlyguides.com/wotlk/guides/pve-fire-mage/#plink-rotation

Co-authored-by: Stefano Borzì <8493b96099859a344ed508187bf32ad62dad99af@gmail.com>
Co-authored-by: Francesco Borzì <38deeb4eb7d6f10166dedad60a8d646aa821503f@gmail.com>
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