Show shake calibration being disabled when in sleep mode

[dariusarnold]

I was confused by the issue with the shake calibration on my PineTime for which a partial fix exists in https://github.com/InfiniTimeOrg/InfiniTime/pull/2161 (thank you lmamane). I adopted those changes and made the suggested enum refactor as well as fixed an issue with the text not disappearing when leaving the shake calibration screen.

Here is a screenshot of the new disabled message:

All changes are:

• Switch from bool EnableForCal to always saving and restoring shake wake mode to avoid to many conditionals in the constructor and destructor
• Refactor calibrating into currentCalibrationStep enum with descriptive names
• Initialize variables with default values in the class body
• Switch to forward declarations for references in the header and remove unused include
• Fix issue where text would stay on screen due to not calling lv_obj_clean() in the destructor

[github-actions[bot]]

Build size and comparison to main:

Section	Size	Difference
text	373312B	192B
data	948B	0B
bss	22536B	0B

Run in InfiniEmu

[mark9064]

After #2328 it now works all the time :) thanks for writing up this feature nonetheless

The refactoring you've done still looks good though, if you would like to open a new PR for that I will try and take a look