Admin panel (#496)

* Added the administrator role and functionality that comes with it  (#403)

* GRN-20: Added roles to the user model

* GRN-75: Added a view for admins to see their users

* GRN-77: Added Edit/Delete/Promote ability for admins

* GRN-71: Added admin account by default

* Changed the way locales are shown

* Updated the rest of the locales

* Changed the way available_locales are defined

* Updated locales in Russian

* Updated locaales for German

* Update user.rb

* Update admins.js

* GRN-15: Added the ability to change color and image from admin interface (#425)

* GRN-20: Added roles to the user model

* GRN-75: Added a view for admins to see their users

* GRN-77: Added Edit/Delete/Promote ability for admins

* GRN-71: Added admin account by default

* Changed the way locales are shown

* Updated the rest of the locales

* Changed the way available_locales are defined

* Updated locales in Russian

* Updated locaales for German

* GRN-15: Added the ability for admins to customize color and image

* Update user.rb

* Update user.rb

* Update routes.rb

* Update admins_controller.rb

* GRN-87:Added a super admin role and made changes to how to the design works (#430)

* GRN-20: Added roles to the user model

* GRN-75: Added a view for admins to see their users

* GRN-77: Added Edit/Delete/Promote ability for admins

* GRN-71: Added admin account by default

* Changed the way locales are shown

* Updated the rest of the locales

* Changed the way available_locales are defined

* Updated locales in Russian

* Updated locaales for German

* GRN-15: Added the ability for admins to customize color and image

* Added the super admin and completed the design tab

* Update user.rb

* Update themes_controller_spec.rb

* Update routes.rb

* Update admins_controller.rb

* Removed duplicated code that broke the build after last merge

* GRN-78: Restructured some of the views to make the UI more consistent and responsive (#435)

* GRN-20: Added roles to the user model

* GRN-75: Added a view for admins to see their users

* GRN-77: Added Edit/Delete/Promote ability for admins

* GRN-71: Added admin account by default

* GRN-15: Added the ability for admins to customize color and image

* Added the super admin and completed the design tab

* GRN-78: Cleaned up buttons and moved signin to its own page

* GRN-78: Moved the Rooms and Recordings link to nav bar

* Merge fix

* Views restructure fix (#458)

* Added cache to gitlab-ci.yml

* Restructured seed

* GRN2-99 -> GRN2-106: UI cleanup and refactoring (#478)

* GRN2-98: Change Fullname to Full name

* GRN2-105: Changed View Users to Manage Users

* GRN2-101/103: Updated email to match branding

* GRN2-100: Updated Email Sent flash to be more descriptive

* GRN2-104: Redirect user to sign in page w/ flash after clicking activation link

* GRN2-102: Changed the wording in the verification email

* GRN2-99: Added email form validation

* GRN2-106: Cleaned up Users list front end

* Fixes to rake and admin password validator for passing rubocop

* GRN2-113: Fixed issues with admin panel (#479)

* GRN2-116: Code clean up after restructure of views (#482)

* Removed unused references

* Rubocop

* Added pagination to admin view (#483)

* GRN2-114: Added the ability for admins to ban/unban users (#487)

* Added the ability for admins to ban and unban users

* Update sessions_helper.rb

*  Merge branch 'master' into admin-panel  (#492)

* Updated rubocop gem

* Updated rubocop and fixed issues (#490)

* Rubocop fixes

* GRN2-122: Updated sign in flow for admins and switch design tab to site settings (#489)

* Switched design tab to site settings

* Update _header with spaces instead of tabs

* Added more test cases to increase coverage (#494)

Gemfile.lock

@@ -56,6 +56,7 @@ GEM
       sassc-rails (>= 2.0.0)
     builder (3.2.3)
     byebug (10.0.2)
+    cancancan (2.3.0)
     coffee-rails (4.2.2)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0)
@@ -174,6 +175,7 @@ GEM
     omniauth-twitter (1.4.0)
       omniauth-oauth (~> 1.1)
       rack
+    pagy (2.1.5)
     parallel (1.17.0)
     parser (2.6.3.0)
       ast (~> 2.4.0)
@@ -226,6 +228,7 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
+    rolify (5.2.0)
     rspec-core (3.7.1)
       rspec-support (~> 3.7.0)
     rspec-expectations (3.7.0)
@@ -336,6 +339,7 @@ DEPENDENCIES
   bigbluebutton-api-ruby
   bootstrap (~> 4.3.1)
   byebug
+  cancancan (~> 2.0)
   coffee-rails (~> 4.2)
   coveralls
   dotenv-rails
@@ -353,6 +357,7 @@ DEPENDENCIES
   omniauth-ldap
   omniauth-microsoft-office365 (~> 0.0.7)
   omniauth-twitter
+  pagy
   pg (~> 0.18)
   puma (~> 3.0)
   rails (~> 5.0.7)
@@ -361,6 +366,7 @@ DEPENDENCIES
   redcarpet
   redis (~> 3.0)
   remote_syslog_logger
+  rolify
   rspec-rails (~> 3.7)
   rubocop
   sass-rails (~> 5.0)