[gnome-shell-sass] screenshot-ui: Add tooltips to buttons

[Florian Müllner <fmuellner src gnome org>]

commit 97c6518e392e11bce28e7daae211f9bb272abafa
Author: Ivan Molodetskikh <yalterz gmail com>
Date:   Fri Dec 10 16:25:09 2021 +0300

    screenshot-ui: Add tooltips to buttons
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1954>

 widgets/_screenshot.scss | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/widgets/_screenshot.scss b/widgets/_screenshot.scss
index 87cd693..1d9cd12 100644
--- a/widgets/_screenshot.scss
+++ b/widgets/_screenshot.scss
@@ -164,3 +164,12 @@
     border: 2px white;
   }
 }
+
+.screenshot-ui-tooltip {
+  color: $osd_fg_color;
+  background-color: $osd_bg_color;
+  border-radius: 99px;
+  padding: $base_padding $base_padding * 2;
+  text-align: center;
+  -y-offset: 24px;
+}