update markdown preview css
Update wiki pages
virtual scroll bar changing style
Merge branch 'master' of https://tesseris.visualstudio.com/DefaultCollection/_git/TGrid
"$apply already in progress" exception in angular footer template demo

Related Work Items: #198
Refactor array items provider sorting and grouping logic
Merge
Gix NRE bug in onLcickOutside on removed element
I also changed class 'table-body-row' to 'tgrid-table-body-row' all over the solution

Related Work Items: #206
196 - Page is scrolling when you scroll sample table.

Related Work Items: #196
merge
Merge branch 'master' of https://tesseris.visualstudio.com/defaultcollection/_git/TGrid
203 - There isn't possibility to select any item, which became visible after scrolling, in any mobile demo in any browser.

Related Work Items: #203
Merge branch 'master' of https://tesseris.visualstudio.com/DefaultCollection/_git/TGrid
Bug 189 and bug 200

Related Work Items: #189, #200
bug 204

Related Work Items: #204
Bug 201

Related Work Items: #201
I deleted redundant scripts
cursor is pointer on group header if collapsing is enable, if it is disabled cursor is default

Related Work Items: #205
205 for mobile, 209 for IE11

Related Work Items: #205, #209