RFR: 8278620: properties installed by javax.swing.LookAndFeel installColors and installColorsAndFont are not uninstalled [v6]

[SWinxy]

> Many `installDefaults` methods set the font, foreground, and background on objects but their inverse methods `uninstallDefaults` do not remove them. I've added an inverse method to remove the colors and font to call for the `uninstallDefaults` methods that install defaults.
> 
> `AquaButtonUI` can call its super since it would otherwise be repeated code. `BasicComboBoxUI` (weirdly) installs the properties again when it should be uninstalling them, so I changed.
> 
> I noticed that, in a few subclasses, only one of calls to the super of `installDefaults` and `uninstallDefaults` are made. That is, an overridden `installDefaults` may call its super while the overridden `uninstallDefaults` does not call its super (or vise versa). These classes are: `AquaTabbedPaneUI`, `SynthMenuItemUI`, `SynthSplitPaneUI`, and `XTextAreaPeer`.
> 
> Sorry I couldn't write a test; I wasn't sure how I should have accessed the protected variable aside from creating extending classes for each class that changed.
> 
> See also #6603, where this issue was discovered.

SWinxy has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains ten commits:

 - Merge branch 'master' into 8278620
   
   # Conflicts:
   #	src/java.desktop/macosx/classes/com/apple/laf/AquaButtonUI.java
 - Revert "Make default fonts FontUIResources"
   
   This reverts commit 1cc422224331440317150f80cf567338376f95df.
 - Make default fonts FontUIResources
 - Minor cleanup on StalePreferredSize
 - BasicPanelUI uninstalling font causes cascading problems
 - Merge branch 'master' into 8278620
 - Sync with CSR
   
   Only difference is that I added an Oxford comma
 - Accidental imports added
 - 8278620: properties installed by javax.swing.LookAndFeel installColors and installColorsAndFont are not uninstalled
   
   Many installDefaults methods set the font, foreground, and background on objects but their inverse methods uninstallDefaults do not remove them. I've added an inverse method to remove the colors and font to call for the uninstallDefaults methods that install defaults.
   
   AquaButtonUI can call its super since it would otherwise be repeated code. BasicComboBoxUI (weirdly) installs the properties again when it should be uninstalling them, so I changed.
   
   I noticed that, in a few subclasses, only one of calls to the super of installDefaults and uninstallDefaults are made. That is, an overridden installDefaults may call its super while the overridden uninstallDefaults does not call its super (or vise versa). These classes are: AquaTabbedPaneUI, SynthMenuItemUI, SynthSplitPaneUI, and XTextAreaPeer.

-------------

Changes: https://git.openjdk.org/jdk/pull/10565/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10565&range=05
  Stats: 173 lines in 28 files changed: 87 ins; 48 del; 38 mod
  Patch: https://git.openjdk.org/jdk/pull/10565.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10565/head:pull/10565

PR: https://git.openjdk.org/jdk/pull/10565