[gnome-software] Add distro upgrade css for the HC theme

[Kalev Lember <klember src gnome org>]

commit d3edb90add9f1cba3b8f51fa857e25e30a293d2c
Author: Kalev Lember <klember redhat com>
Date:   Fri Apr 3 16:00:12 2020 +0200

    Add distro upgrade css for the HC theme
    
    Just copy the regular css over so that the banner doesn't look
    completely off.

 src/gtk-style-hc.css | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
---
diff --git a/src/gtk-style-hc.css b/src/gtk-style-hc.css
index 959823e6..1006649e 100644
--- a/src/gtk-style-hc.css
+++ b/src/gtk-style-hc.css
@@ -222,6 +222,24 @@ button.star, .button.star {
        padding: 16px;
 }
 
+.upgrade-banner {
+       background-color: #1c5288;
+       padding: 0px;
+       border-radius: 4px;
+       border: 1px solid darker(@theme_bg_color);
+       color: @theme_selected_fg_color;
+}
+
+.upgrade-buttons {
+       padding: 18px;
+       border-bottom-left-radius: 4px;
+       border-bottom-right-radius: 4px;
+}
+
+.upgrade-progressbar {
+       box-shadow: none
+}
+
 .eol-box {
        background-color: @theme_selected_bg_color;
        border: 1px solid shade(@theme_selected_bg_color, 0.8);