Intensity Legacy

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Added reps metric to stats
Added workout notes (long hold on the date to edit/view)
Added workout duration (long hold on the date to edit/view)
Added ability to add plates to warmup and plate calculator
Settings for warmup and plate calculator persist session to session
Ability to clear offline data from Settings (in case of corruption)
Adjusting offline data tracking to optimise for performance and reduce errors
Various minor changes and bug fixes