[NEXUS-6820] Add option to not automatically hide tab header when there is only one tab

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-6820] Always show repository tabs header

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Always show repository item info tabs header

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge branch 'master' into NEXUS-6817-upgrade-extjs-4.2.3-take3
Minor, drop ... in loading js