[BasicUI] Fix unit determination for min/max from item state description

[lolodomo]

Concerns the Colortemperaturepiucker element.

[andrewfg]

@lolodomo to be honest, I do not support this; it is a kludge; we need to add a proper range unit to the state descriptions

[lolodomo]

we need to add a proper range unit to the state descriptions

Of course but it is probably too late for OH 4.3. So I propose something working well for OH 4.3, our priority.
When something better is available in OH core, of course I will adjust Basic UI.

So see this fix as required for OH 4.3 until a better solution is implemented and merged n core framework.

[andrewfg]

..with the proviso that we should revisit this code once core 4432 is done .. LGTM :)