CTabFolder LEFT/RIGHT 01 #2203

[pazi146]

getters/setters:
SWT.LEFT and SWT.RIGHT are now valid positions
tab width can be set

no changes changes in behaviour (RIGHT and LEFT act like TOP)

Part of #2203

[github-actions]

Test Results

104 files   -    441  104 suites   - 441   6s ⏱️ - 32m 38s
 66 tests  -  4 333   66 ✅  -  4 315  0 💤  -  18  0 ❌ ±0 
213 runs   - 16 510  213 ✅  - 16 369  0 💤  - 141  0 ❌ ±0 

Results for commit 5937f7a. ± Comparison against base commit e40ad29.

This pull request removes 4333 tests.

AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicASCII_dollarSign
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicASCII_emptyString
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicASCII_letterA
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicASCII_letters
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicUTF16LE_null
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicUTF16_AsciiLetters
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicUTF16_Asciiletter
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicUTF16_LotsOfLetters
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicUTF16_letter
AllGTKTests org.eclipse.swt.tests.gtk.Test_GtkConverter ‑ test_HeuristicUTF16_letters
…