RFR: 4819: Improved tooltips and context menus for Stack Trace View [v5]

[Miroslav Wengner]

> bug fix: https://bugs.openjdk.java.net/browse/JMC-4819 tooltips
> 
> I'd propose, if not created yet, to create a ticket according to the correct behaviour of Stacktrace when treeView is selected (enabled/disabled) and switching over branches with enabled/disabled "Layout Option -> Reduce Tree Depth". Also when the current setup us saved and JMC reopened.

Miroslav Wengner has updated the pull request incrementally with one additional commit since the last revision:

  4819: clean

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

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/140/files
  - new: https://git.openjdk.java.net/jmc/pull/140/files/e70f1789..9b1e1043

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=140&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=140&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jmc/pull/140.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/140/head:pull/140

PR: https://git.openjdk.java.net/jmc/pull/140