[GTK4] Stop Shell.bringToTop from crashing on Gtk 4.x

[akurtakov]

Fetch GdkDisplay from GdkSurface as done on Wayland

[github-actions]

Test Results

   408 files   -   137     408 suites   - 137   28m 14s ⏱️ - 14m 29s
 4 343 tests  -    37   4 327 ✅  -    34   16 💤  -  2  0 ❌  - 1 
12 542 runs   - 4 108  12 428 ✅  - 4 080  114 💤  - 27  0 ❌  - 1 

Results for commit 57bca70. ± Comparison against base commit 1b7b9bb.

This pull request removes 37 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
…

♻️ This comment has been updated with latest results.