Add fixed update docs
raise App Version to stable Branch 5.3
Merge pull request #4420 from martinlauer/patch-1

raise App Version to stable Branch 5.3
Merge pull request #4387 from Razer6/fix_update_docs_for_5_3_stable

Add missing update docs from 5.2 to 5.3 to 5.3 stable branch
Merge remote-tracking branch 'upstream/5-3-stable'

Conflicts:
	doc/update/5.2-to-5.3.md