This update for gtk3 fixes the following issues:

Update from version 3.24.14 to version 3.24.20

- Updated translations.
- GtkMenu under X11 cannot work with touchscreen because it cannot handle touch events properly. (bsc#1167951)
- GtkFileChooser:
- Prevent selection changes after overwrite confirmation.
- Don't grab focus to the sidebar on click.
- Avoid a use-after-free in GtkFileSystemModel.
- Fix some keynav issues.
- Fix a crash.
- Support selecting directories with a new enough file chooser portal.
- GtkEmojiChooser: Remove blacklist.
- GtkAboutDialog: Add more licenses.
- GtkMenuButton: disable focus-on-click.
- Adwaita:
- Lower the contrast of checkboxes
- Use tabular figures where appropriate.
- Color tweaks for dark mode.
- Improve rendering of rounded corners.
- HighContrast: Export the same public colors as Adwaita
- Derive the HighContrast and HighContrastInverse themes from Adwaita.
- Wayland:
- Fix more sizing regressions in Epiphany and LibreOffice menus and popups in general.
- Fix firefox sizing problems.
- Prevent Alt lingering after Alt-Tab.
- Load compose sequences from ~/.Compose.
- Fix a crash in the Wayland input method.
- Fix problems with clipboard handling.
- Fix a crash in the Wayland input method.
- Support cursor scale of 400%.
- Fix a crash in glade.
- textview: Speed up tag handling.
- css: Support font-feature-settings

This update was imported from the SUSE:SLE-15-SP2:Update update project.