fix z-index priority for parent menu items

fixes #2702
better CSS for long menu items with children
Fix the margin on nested has_many sortables
Remove duplicated CSS rule
Merge pull request #2707 from shekibobo/fix-sortable-margin

Fix the margin on nested has_many sortables
Merge pull request #2705 from seanlinsley/css/2704-long-menu-items

[2704] better CSS for long menu items with children
Update rspec to expect syntax, plus == to eq
Merge pull request #2681 from durrantm/rspec_expect_syntax

Update rspec to expect syntax, plus == to eq
typo fixes
freenode verification
delete freenode.txt
add ransack to the dependency list in README
#2708 Add skip_after_filter rails filter
fix translation for has_many 'delete' and 'remove'
Merge pull request #2715 from Clamoris/2708_add_skip_after_filter

#2708 Add skip_after_filter rails filter
Merge pull request #2719 from mindhalt/patch-2

Fix translation for has_many 'delete' and 'remove'
filter code style update