Fix issues with home found during Huber Hardware testing. [Timebox: 2 days]

[LowriJenkins]

The Huber does has a couple of small issues when homing that should be fixed:

• It fails to home properly under some circumstances on hardware (appears to be when at a limit, may be more specificly while near home and at a limit). This leads to it not properly removeing the flag to home, and thus homing as soon as it finishes a move that brings it away from said limit.
• The setpoint often ends up a nonsense value after homing, it should instead be set to 0 like the value is.

Where?

C:\Instrument\Apps\EPICS\support\motorHuber\master\huberApp\src\SMC9300Driver.cpp

Acceptance criteria

• The Huber homes properly while at a limit, or at least does not immediatly home when moved away from the limit after attempting to home it and it getting stuck.
• The setpoint is properly set to 0 alongside the value.

How to Test

verbose instructions for reviewer to test changes
(Add before making a PR)

[LowriJenkins]

The huber will be used in experiments during november, none of neither of these issues would prevent use, however they would be nice to have fixed if possible.

[LowriJenkins]

The improper homing behaviour at limits is a result of a check in the motor driver, after brief discussion with tom and freddie, I've raised a discussion issue #7380. Until a decision is reached on this front, I have changed the motor OPI so that the forward home button is disabled when you are at the positive limit, and added a tooltip explaining that you cannot forward home while at the limit.