RFR: 6244831: JFileChooser does not have tooltip for Desktop, Recent etc ToggleButton on Windows Look and feel

[Tejesh R]

Tooltip is not shown for the buttons placed in left side of JFileChooser(In Windows Look And Feel), namely the shellFolder like (Recent Items, Desktop, Documents). Hence the tooltip is added for those shell folders/WindowBar when they are constructed. The Automatic test is added.

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Commit messages:
 - Test case added
 - Fix

Changes: https://git.openjdk.org/jdk/pull/10819/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10819&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-6244831
  Stats: 112 lines in 2 files changed: 112 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/10819.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10819/head:pull/10819

PR: https://git.openjdk.org/jdk/pull/10819