2sxc 10.04: TinyMCE 5 and DNN 9.4 Support

Two months of work, lots of awesome things

Highlights

1. WYSIWYG Editor is now TinyMCE 5
2. WYSIWYG Editor is now responsive / mobile ready and toolbar works
3. WYSIWYG Editor now shows source-button in simple mode
4. .net Core implementation changed, for compatibility with DNN 9.4
5. new Edit-UI shows better messages when fields are not yet valid
6. new Edit-UI now has debug-mode (ctl+alt+shift+click to activate)
7. Updated new edit UI from Angular 7 to Angular 8.2.4

Fixed bugs and issues

1. Language switching in sub-dialogs now doesn't affect main dialog
2. Version dialog works again #1798
3. Export content app works again (issue with authentication) #1795
4. Bug in certain dialogs when the app hasn't been selected yet #1797
5. Certain wysiwyg fields didn't work properly
6. Bug with GPS picker field
7. Auto-set focus to wysiwyg when opened
8. JS Source-Maps work again in the NG8
9. Error when saving entities without fields (like string-field configurations) #1796

Refactoring

1. Changed ngrx/store to handle most of the data using ngrx/data
2. Cleaned input-type fallback-handling on server instead of JS
3. External components are now fully configured through metadata
4. Simplified API for custom input fields (WebComponents)