Don't respect showjumplinks, remove unneeded sitename check, improve rtl

Reason for not respecting showjumplinks is same as https://gerrit.wikimedia.org/r/#/c/25751/
RTL improvement is reversing the horizontal top menu when in rtl mode

Change-Id: Ifd8981172a6e7752b3ca3b5f3c761aec66c71530