implement actions for CVWidgetMS
(including display in editor - not finished)

Signed-off-by: nuss <st9fan@gmail.com>
CVWidgetMS, CVWidgetMSEditor: actions interface basically implemented
pretify instant display of added actions a bit

Signed-off-by: nuss <st9fan@gmail.com>
update README.md

Signed-off-by: nuss <st9fan@gmail.com>
(cherry picked from commit 41011ba4f9bb256bc8ac34b66add1e26255825f1)