RFR: 8205067: Resizing window with TextField hides text value

[Karthik P K]

Because of a missing conditional check in the `updateTextPos()`,  the `textTranslateX` value was not getting updated when TextField size was changed as a result of resizing window.

Updated the CENTER and LEFT cases in the `updateTextPos()` method to fix the issue.

The fix can be validated using MonkeyTester.
Steps to select TextField option in Monkey Tester.

- Open the MonkeyTester app and select TextField from the left option pane.
- Select Long from Text selection option and TOP_LEFT from Alignment dropdown.
- After above step, follow the steps given in the bug to validate the fix in monkey tester.

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Commit messages:
 - Fix textfield resizing issue

Changes: https://git.openjdk.org/jfx/pull/1263/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1263&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8205067
  Stats: 4 lines in 1 file changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jfx/pull/1263.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1263/head:pull/1263

PR: https://git.openjdk.org/jfx/pull/1263