BBUI: only one slider is active at a time

In BBUI, the sliderbar only works for active probes. if you create a new probe with sliderbar, the previous slider will get disabled and will not able to move it right or left.

Start by locating the BBUI sliderbar implementation and reproduce the behavior with two probes. Trace how activating a new probe changes the previous slider's state. Done means sliders for multiple probes remain movable after another probe is created, with any relevant existing checks updated or added.

Written by the indexing model from the issue text.