re #7887 Deleting configurations and assemblies, Minor restructuralization.
re #7884 update functionality for updated template
re #7884 - added frontend drag and drop for assembly
Merge branch 'master' into 'enhancement/7886'
re #7881 ability to create or edit a user configuration and set or edit its basic attributes, operator value and configuration name are validated, if operator value is wrong user is redirected to main page, auto increment functionality changed to IDENTITY
re #7881 loading of attributes of assembly on main page
re #7886 Creating + Editing assemblyNot working: Adding new role to access list, Loading values for parameter, Adding new values for parameter, disabling functions + operators if data type = enumeration, deleting role from Access list, Deleting parameter. Saving new assembly + checking all form elements....
fix view for chrome and firefox
re #7871 Added edit formula for every assembly.
re #7871 - connect templates with data from database
re #7871 Displaying list of assemblies + displaying result table of selected assembly.
re #7779 Convert TableColumn -> ContingencyTableRow and send it to frontend. SQL query is now executed in specific class DatabaseInterface via SqlQueryManager.
re #7668 Project init with connecting to demo database