`Stage` minimalizing (iconified state) cannot be disabled for the user. The same for `Stage` closable state. PR adds these features without breaking backward compatibility.
------------- Commit messages: - 8090522: Allow support for disabling stage iconification (minimization) Changes: https://git.openjdk.java.net/jfx/pull/798/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=798&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8090522 Stats: 199 lines in 5 files changed: 198 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jfx/pull/798.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/798/head:pull/798 PR: https://git.openjdk.java.net/jfx/pull/798
