Rename content template table editor admin plugin instance

to better describe table it uses
we are also going to show different tables
Show first module content in case there is only one module in Admin
Remove article_list admin plugin file

because the plugin was deprecated and gotten rid of
Use args array when creating new TableEdit admin plugin
Use Template package to display admin template
Show module title if any
Do not restrict admin content templates only to plugin subdirectory
Fix admin captions css
Handle multiple plugins in Admin

also make it possible to display user data in Admin
Remove no longer DB call for admin plugin ArticleList
Add back button to all plugin pages in Admin

to make navigation to Admin index easier
Do not allow to update users table in Admin

make it possible to hide save button from TableEdit admin plugin
Implement new EditableColumn type "password"

so we don't display password raw data
Minor refactoring in TableEdit admin plugin template
Deduplicate <td> cell tag in TableEdit admin plugin template
Better initialize id in TableEdit template
Improve the way of getting columns array in TableEdit template
Do not show error when content_image not set
Create table for user vars
Rename table t_user_vars to t_discounts