[gnome-shell] endSessionDialog: Use a fixed width of 30em

[Florian Müllner <fmuellner src gnome org>]

commit 747ba97dbd7e1831f2f974ae924fb0b21b4df0c8
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Tue Jan 28 16:21:54 2020 +0100

    endSessionDialog: Use a fixed width of 30em
    
    Make sure we don't rely on the size of the largest part of the layout
    when aligning the endSessionDialog and use a fixed width of 30em
    instead.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/965

 data/theme/gnome-shell-sass/widgets/_dialogs.scss | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/data/theme/gnome-shell-sass/widgets/_dialogs.scss 
b/data/theme/gnome-shell-sass/widgets/_dialogs.scss
index 8ce964a8b8..bd49e7393f 100644
--- a/data/theme/gnome-shell-sass/widgets/_dialogs.scss
+++ b/data/theme/gnome-shell-sass/widgets/_dialogs.scss
@@ -22,6 +22,8 @@
 /* End Session Dialog */
 
 .end-session-dialog {
+  width: 30em;
+
   .end-session-dialog-battery-warning,
   .dialog-list-title {
     color: $warning_color;