[UI] Hover number for overshield not responsive in active mode

[TheLadySeraphina]

Description

In active mode, hovering over the overshield bar only displays total overshield, rather than the value that is being hovered over. This is likely a bug since it is inconsistent with how the hover value works with hp, heat, movement, etc.

Screenshots

Overshield hover (Here I'm hovering over the 5th bar, yet the number shows 10):

HP Hover (Note how number shown reflects where I'm hovering):

Movement Hover:

[jarena3]

massif-press/compcon#3103

[jarena3]

tracking this in the ticket from here on out