Descriptions for new features in 4.4

Merged Peter Schatz requested to merge voronwe/docs-krita-org:voronwe/lightnessupdates into master

Adds descriptions for new brush modes (Lightness and Gradient maps), new brush options (Lightness Strength), new texturing options (Lightness and Gradient Maps), and new gradient options (Foreground/Background color stops and segment endpoints).

Edited by Peter Schatz

Merge request reports