Merge branch 'rkaraivanov/grids-restructure' of https://github.com/IgniteUI/igniteui-angular.git

Author: MKirova

ROADMAP.md

@@ -4,15 +4,15 @@
 ## Milestone 10 (Due by December, 2019)
 
 1. Dock Manger [#5980](https://github.com/IgniteUI/igniteui-angular/issues/5980)
-2. Theming service for Ignite UI for Angular
+2. Theming service for Ignite UI for Angular [#5999](https://github.com/IgniteUI/igniteui-angular/issues/5999)
 3. Range Date Picker [#5732](https://github.com/IgniteUI/igniteui-angular/issues/5732)
 4. igxGrid overlay components exposed for instantiation in arbitrary container [#5878](https://github.com/IgniteUI/igniteui-angular/issues/5878)
 5. RTL Support across Ignite UI for Angular components [#5958](https://github.com/IgniteUI/igniteui-angular/issues/5958)
 6. Carousel slide animations/transitions [#4268](https://github.com/IgniteUI/igniteui-angular/issues/4268)
 7. Access all data when calculating summary per column [#5754](https://github.com/IgniteUI/igniteui-angular/issues/5754)
-8. Angular 9 support [#5849](https://github.com/IgniteUI/igniteui-angular/issues/5849)
+8. Angular 9 support [#5998](https://github.com/IgniteUI/igniteui-angular/issues/5998)
 9. Allow master-detail style visualization with igxHierarchicalGrid [#5880](https://github.com/IgniteUI/igniteui-angular/issues/5880)
-10. Collapsible column groups (column expansion state templates) [#3343](https://github.com/IgniteUI/igniteui-angular/issues/3343)
+10. Collapsible column groups (column expansion state templates) [#3343](https://github.com/IgniteUI/igniteui-angular/issues/3343) 
 
 ## Going down the road