Grant permission to multiple users simultaneously (UI and/or REST)

Grant permissions from UI

At moment, under "Plan configuration >> Permissions" it is requires to add Users one-by-one as per bamboo.addUser01.png. It would be interesting having the ability to add multiple users separated by comma (,) as per bamboo.addUser02.png, which would speed up the process.

Grant permissions from REST

It would be interesting extending this functionality through the REST API call

http://myhost.com:8085/bamboo/rest/api/latest/plan/{projectKey}-{buildKey}/permissions [GET, POST]

{
"permissions": [
	{"Administrator": ["View","Edit","Build","Clone","Admin"]},
	{"MyUser": ["View","Build"]}
]
}