Gnome Shell 47 compatibility, build system updates

• Gnome Shell 47 compatibility.
• Update meson-gse:
  • Now requires meson 1.4.0 or later.
  • Build now runs eslint on test, added prettier target.
• Update to pass eslint.
• Code reformatted with prettier.

Gnome Shell 46 compatibility

• Gnome Shell 46 compatibility.

Gnome Shell 45 Bugfixes

• Fix object lifetime issues raised in rejected version 15 review.

Gnome Shell 45 compatibility

• Gnome Shell 45 compatibility.
• Now incompatible with all older Gnome Shell lower than 45. Version 14 still works fine for these older installations.

Gnome Shell 44 compatibility

• Gnome Shell 44 compatibility.
• Switch preference layout to vertical for better visibility.
• Update meson-gse:
  • js102 support

Gnome Shell 43 compatibility

• Gnome Shell 43 compatibility.
• Update meson-gse:
  • js91 support
  • Support meson 0.61 and later when building.

Gnome-shell 42 compatibility

• Gnome Shell 42 compatibility.
• Update instructions to use gnome-extensions instead of manually unzipping.
• Js cleanup.

Clean-ups and bug fixes release

• Declare compatibility with version 40 and 41 of Gnome Shell instead of using minor versions (40.0 and 41.1). This should clear reports of the extension being incompatible with well-supported versions.
• Drop compatibility with Gnome Shell 3.28 and 3.30 (which do not have getSettings/initTranslations in ExtensionUtils).
• Update meson-gse:
  • Fix build issues with meson 0.60.0.
  • Bump minimum meson version to 0.50.0.
• Clean up code:
  • Remove Lang imports.
  • Use ExtensionUtils for getSettings/initTranslations instead of using meson-gse's convenience.js.

Dutch Translation

• Add Dutch translation.

Gnome-shell 41.0 compatibility

• Gnome-shell 41.0 compatibility.
• Update meson-gse to latest:
  • Bugfix for preferences logging.