[gnome-shell-sass] endSessionDialog: Rename "warning" css class to "battery-warning"

[Florian Müllner <fmuellner src gnome org>]

commit 871f6f2d51adc4a8c0d4418650108238c693ac93
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Thu Dec 5 13:04:38 2019 +0100

    endSessionDialog: Rename "warning" css class to "battery-warning"
    
    Since this css class is specifically about the low-battery warning, make
    the class name a bit more specific, too.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/935

 widgets/_end-session-dialog.scss | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/widgets/_end-session-dialog.scss b/widgets/_end-session-dialog.scss
index 15b975f..73116b8 100644
--- a/widgets/_end-session-dialog.scss
+++ b/widgets/_end-session-dialog.scss
@@ -24,7 +24,7 @@ $end_session_dialog_width: 28em;
   }
 }
 
-.end-session-dialog-warning {
+.end-session-dialog-battery-warning {
   width: $end_session_dialog_width;
   color: $warning_color;
   padding-top: 6px;
@@ -77,4 +77,4 @@ $end_session_dialog_width: 28em;
 .end-session-dialog-app-list-item-description {
   color: darken($fg_color,5%);
   @include fontsize($base_font_size - 1);
-}
\ No newline at end of file
+}