ECMS-5866: [IE8] Weird UI of checkboxes

Fix description:
	- Add the conditional comments to allow bootstrap detect the IE version
ECMS-5994: [IE8][Content Admin] Impossible to delete a comment for a node
ECMS-5755 [acme] Print and Close actions hidden by Trial Banner

Fix description
* add padding-bottom for ActionContainer div
Merge commit 'a2932a4ea1e4f0e37780690c6597099b9cf4bfcb' into HEAD