[gnome-shell] extensions-app: Add description tooltip to rows

[Marge Bot <marge-bot src gnome org>]

commit 9fcbf3d0f928a4ed818928bea639d517dcc5a49b
Author: Leleat <atule pm me>
Date:   Wed Feb 10 02:18:19 2021 +0100

    extensions-app: Add description tooltip to rows
    
    ... to allow showing the full description in case the label is ellipsized.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1663>

 subprojects/extensions-app/js/main.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/subprojects/extensions-app/js/main.js b/subprojects/extensions-app/js/main.js
index 624318197b..5b5a6e4036 100644
--- a/subprojects/extensions-app/js/main.js
+++ b/subprojects/extensions-app/js/main.js
@@ -421,8 +421,9 @@ var ExtensionRow = GObject.registerClass({
 
         this._nameLabel.label = this.name;
 
-        let desc = this._extension.metadata.description.split('\n')[0];
+        const desc = this._extension.metadata.description.split('\n')[0];
         this._descriptionLabel.label = desc;
+        this._descriptionLabel.tooltip_text = desc;
 
         this._revealButton.connect('clicked', () => {
             this._revealer.reveal_child = !this._revealer.reveal_child;