This work improves the performance of `MultipleSelectionModel` over large data sets by caching some values and avoiding unnecessary calls to `SelectedIndicesList#size`. It further improves the performance by reducing the number of iterations required to find the index of an element in the BitSet.
The work is based on [an abandoned patch](https://github.com/openjdk/jfx/pull/127) submitted by @yososs There are currently 2 manual tests for this fix. ------------- Commit messages: - Update line ending for SelectTableViewTest - Update line ending - Add manual tests - 8197991: Selecting many items in a TableView is very slow Changes: https://git.openjdk.java.net/jfx/pull/673/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=673&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8197991 Stats: 256 lines in 4 files changed: 250 ins; 0 del; 6 mod Patch: https://git.openjdk.java.net/jfx/pull/673.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/673/head:pull/673 PR: https://git.openjdk.java.net/jfx/pull/673
