Upgrade !hp, !mp and !tp commands

[zach2good]

I affirm:

• that I agree to Project Topaz's Limited Contributor License Agreement, as written on this date
• that I've tested my code since the last commit in the PR, and will test after any later commits

I've been using this modification to these commands for a couple of weeks now and I couldn't do without them. Maybe they could be useful to others too.

[ibm2431]

Should the entered name take priority over the cursor target? I can envision someone becoming frustrated trying to get a player's stats but it failing because they were targeting something else.

[TeoTwawki]

Should the entered name take priority over the cursor target? I can envision someone becoming frustrated trying to get a player's stats but it failing because they were targeting something else.

I also expect I'll accidentally heal mobs I didn't mean to.

[ibm2431]

Reordered the if a little so that the typed-in name takes priority over the current cursor target. Tested locally.

Approved. Thanks, zach!