Trackbar jumps to wrong position when clicked.

[dlamkins]

https://i.gyazo.com/c185f613865f1ca38e36b02cbefc7044.gif
https://i.gyazo.com/bfde64ab95e0c0f4844d533fc246cba7.gif

The trackbar jumps when clicked on. Appears to be made worse when the starting offset is non-zero. Replicate with the setting:

REF: https://discord.com/channels/531175899588984842/599270434642460753/892811075966349353

[entrhopi]

I tried to mitigate this by subtracting 29 from _dragOffset in https://github.com/blish-hud/Blish-HUD/blob/dev/Blish%20HUD/Controls/TrackBar.cs#L96 like so:
var relMousePos = this.RelativeMousePosition - new Point(_dragOffset - 29, 0);

This seems to lessen the effect but the closer you get to the left or right of the bar there will be a tiny drift to either side.

I will investigate this further.

[entrhopi]

Found part of the issue:
If a MinValue other than 0 is specified, then this would be the wrong slider offset as seen in the examples above.

Working on a fix now.

[dlamkins]

Closed by #556!