Bunch of small things

@eurich .. I think there is another .elk needed here https://github.com/Spuds/Elkarte/commit/cd9a4a656094964ea417db0a79b575dc1a54980e

@emanuele45 I think we need the menu.subs file here https://github.com/Spuds/Elkarte/commit/800d64c1e6315ef11fed2fb31c4abe83e106da60

convert a few $context['settings_post_javascript'] = ' to addInlieJavascript
cp from smf21 ... schedule task error feedback when using run now (it would always just say completed even if there were errors)

Other than that, really a bunch of ultra mundane changes ...  , some minor eye candy js tweaks,, txt strings, etc