Update site_bar.css.scss

I deleted line 53 in site_bar.css because it's the same as line 14.
Merge pull request #2394 from arnie05/master

Update site_bar.css.scss
Preventing a scenario where, in some rare/odd cases a Refinery::Menu item has a nil depth, we don't want it to cause an issue when getting the min depth
Merge pull request #2396 from tenpaiyomi/master

Preventing a scenario where, in some rare/odd cases a Refinery::Menu ite...
Merge branch 'master' of github.com:refinery/refinerycms into refinery_light

Conflicts:
	core/app/assets/stylesheets/refinery/site_bar.css.scss
	core/lib/refinery/menu.rb
role alert to flash box
new hash syntax in migrations + update timestamps to not null
use squish method instead of custom regexp
yeild :browser_title to prevent misapprehension
updated new hash syntax also in engine templates and in crud_spec
refactoring page parts, directly:

- removed menu_title in favor of content title
- removed hidden sections option
- side_body has own presenter as title part
- included perex part as default hidden
"derefinerization" of refinery plugin names
fixed engine generators namespacing + fixed bugs introduced by myself
introduced refinery.UserInterface object for frontend js
moved layout? method from admin base controller to app controller

+ improved refinery plugin detection from params[:controller]
removed layout_template and view_template functionality from pages

it makes code more complex and cause also problems on other than pages controller
or extensions. So this funcionality should and maybe will be supported by extra extension.
changed version number to one less problematic
improved refinery plugin detection from params[:controller]
update engine generators

- using new hash syntax in generated code
- removed obsolete "reject locale_picker"
- fixed addition image a resource lines in generated engine model
- fixed engine routes
- include .gemfile part to generated Gemfile
updated resource and image picker

- update images and resources dialog
- updated related js