Tweak Special:Log/block for supporting RTL wikis

dir="ltr" was added to make block durations on Special:Log/block
readable for non-local admins, While removing it, I used a
solution to keep block duration on title readable for non-local
admins and making inner text readable for local users

Change-Id: I31aef50196319be7355ad14657e67ca23fc15e20
Merge "Tweak Special:Log/block for supporting RTL wikis"