Feature 1455 - Display image,text or both in table row actions area

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>
Rename the global variable from row_action_type to RowActionType

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>
Merge remote branch 'upstream/master' into feature-1455
Merge pull request #777 from Chanaka/feature-1455

Feature 1455 - Display image,text or both in table row actions area