GPII-364: Created the contrastThemeWithInversion adjuster.
GPII-364: Added the "inverted" contrast theme.
Rearranged the themes' order.
GPII-364: Styled the indicator of contrast theme with inversion.
Added textual information on selections.
GPII-364: Changed header title to "Change contrast".
GPII-364: Updated schema for PCP with new theme adjuster.
NOJIRA: PMT schema is default.
Merge branch 'adjusters-pilots-2' into frames-pilots-2

Conflicts:
	src/shared/adjusters/messages/el/contrast.json