SDBELGA-267 Hide image editing controls for not editable image in carousel (#3370)
SDBELGA-267 Hide image editing controls for not editable image in carousel (#3370)

* SDBELGA-267 [EDITOR3] Related images from Belga Image database shouldn't be editable for the users.

* SDBELGA-267 [EDITOR3] Move logic connected with '_type.externalsource' out of isMediaEditable.

* SDBELGA-267 Simplify show/hide image editing tools condition.

* SDBELGA-267 Hide image editing controls for not editable image in carousel

petrjasek/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,pavlovicnemanja/superdesk-client-core,pavlovicnemanja/superdesk-client-core,pavlovicnemanja/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,pavlovicnemanja/superdesk-client-core,superdesk/superdesk-client-core,pavlovicnemanja/superdesk-client-core