14 temperature gage

[annashens]

1. recycled same "body" container (w/ scroll, padding, alignment) for page 2 as page 1 (created body_view)
2. Added syncfusion temperature gage -> I) user can change temp value w/ step size 10, II) if the user moves the temperature gage while isON=false, it will toggle power so isON=true.
3. Updated temperature state variable to be an int instead of double
4. Added brightness and power toggle to page 2
5. Fixed a small padding thing with the brightness label

[Stanlist]

lgtm