Fix for not adding tab if there are less than 7 tabs

#17
Forgot to minus one from the target count

Indexes start at 0 not 1! #17
Fix for not adding tab if there are less than 7 tabs

Fixes #17
Updated Steam_Login.xml for 1.1.2
Merge pull request #18 from Lavoaster/fix/ucp_missing_managesteam

Fix UCP Missing Manage Steam link