sensor model: rm unnecessary em->px calculation

IS [#57165028]

Turns out getHeightForWidth can return a value in em and it works!
sensor model: fit graph w/o percentages

IS [#57165028]
sensor model: hide builtin "analyze data"
Whoops, "disabled" Lab buttons were clickable!
Use click delegation form for sensor model view too
Add comments about async waiting in resetModel

[#57179922]
Model reset and reload should stop first!

[#57179922]
Fix discard-data form

IS [#57072876]

Using prop instead of attr will bite you when the prop in question is "disabled"! As will hiding the form when it is dismissed but creating a new form every time it is shown.
rm not hide the dialog from depths of sensor model
IS Pendulum: keep graph axes on reset

IS [#57097156]
IS Pendulum: custom "analyze data" button

This custom buton can be hidden when there is no data yet.

IS [#57097156]