fix: get_branch_status_short should unpack gone value
fix: get_branch_status_short should unpack gone value

In commit 6b5fd98c _get_branch_status_components was updated to return a
seventh value (boolean indicating if the remote branch was gone), but
get_branch_status_short wasn't updated to unpack this value.

jmanuel1/GitSavvy,dreki/GitSavvy,ddevlin/GitSavvy,stoivo/GitSavvy,dvcrn/GitSavvy,theiviaxx/GitSavvy,asfaltboy/GitSavvy,divmain/GitSavvy,divmain/GitSavvy,ralic/GitSavvy,jmanuel1/GitSavvy,ddevlin/GitSavvy,ralic/GitSavvy,divmain/GitSavvy,dreki/GitSavvy,ddevlin/GitSavvy,dvcrn/GitSavvy,asfaltboy/GitSavvy,asfaltboy/GitSavvy,stoivo/GitSavvy,theiviaxx/GitSavvy,stoivo/GitSavvy