RFR: 5067: Content assist uses too much screen area

[Miroslav Wengner]

bug fix: https://bugs.openjdk.java.net/browse/JMC-5067

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Commit messages:
 - Merge branch 'master' of https://github.com/openjdk/jmc into bugfix/5067_Content_assist_uses_too_much_screen_area
 - 5067: popup text helper size corrected

Changes: https://git.openjdk.java.net/jmc/pull/139/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=139&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-5067
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/139.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/139/head:pull/139

PR: https://git.openjdk.java.net/jmc/pull/139