RFR: 8178368: Right alignment of text fields works incorrectly

Wed Dec 21 11:04:43 UTC 2022

When Text width was more than TextField width, condition to update `textTranslateX` was not getting satisfied as calculated value was negative. Hence the text was getting aligned to previous `textTranslateX` value.

Added else block to update the `textTranslateX` value when calculated value is negative.

Added unit test to validate the fix.

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Commit messages:
 - Fix for TextField right alignement issue

Changes: https://git.openjdk.org/jfx/pull/980/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=980&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8178368
  Stats: 28 lines in 2 files changed: 28 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/980.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/980/head:pull/980

PR: https://git.openjdk.org/jfx/pull/980