Setting HP while having temp HP sets the wrong value

[magroader]

• Have full HP
• Long press the HP bar
• Add 7 temp HP and press OK
• Tap the HP bar
• Press OK
• Notice the regular HP is now set to 7 more than it was before

The "set the HP" logic is taking temp HP into account for some reason. It should use non-temp HP for the initial value in the dialog.