Merge pull request #266 from dejan-brkic/2.4.x

CRAFTERCMS-879
CRAFTERCMS_843: image picker fix
Merge pull request #269 from hlim/2.4.x

CRAFTERCMS_843: image picker fix
CRAFTERCMS-842: rte fix for multi-subdomain env
CRAFTERCMS-846: ICE dialog cancel when there's hash on URL
Merge pull request #271 from rart/2.4.x

CRAFTERCMS-846 & CRAFTERCMS-842