RFR: 8177945: Single cell selection flickers when adding data to TableView [v2]

[Jose Pereda]

> As discussed in the JBS [issue](https://bugs.openjdk.java.net/browse/JDK-8177945), there are some inconsistencies in the use of `VirtualContainerBase::requestRebuildCells` from `VirtualContainerBase::updateItemCount()`, which is implemented in the different skin classes for virtualised controls `TableViewSkinBase`, `ListViewSkin` or `TreeTableViewSkin`.
> 
> The latter already commented out this call (related to JDK-8155798 and JDK-8147483). 
> 
> This PR removes now the calls to `VirtualContainerBase::requestRebuildCells` from `TableViewSkinBase`  (except for the case `itemCount = 0` based on JDK-8118897 and JDK-8098235) and `ListViewSkin`.
> 
> A test is provided for TableView, that verifies that the `selected` pseudo-class state remains set for the selected cell while adding more items. Without this fix, as the cells are rebuilt, the pseudo-class states are clean and set all over again, thus the flickering.
> 
> For ListView, the test rt_35395 (JDK-8091726) is updated, as now there are way less calls to updateItem.

Jose Pereda has updated the pull request incrementally with one additional commit since the last revision:

  Address feedback

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/348/files
  - new: https://git.openjdk.java.net/jfx/pull/348/files/ab640948..eb69b4ab

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=348&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=348&range=00-01

  Stats: 4 lines in 2 files changed: 3 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/348.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/348/head:pull/348

PR: https://git.openjdk.java.net/jfx/pull/348