[gnome-builder] themes: work around broken distro themes

[Christian Hergert <chergert src gnome org>]

commit 02721c1458286a578ea093a10c864393a7e8a9d3
Author: Christian Hergert <chergert redhat com>
Date:   Fri Apr 23 13:20:47 2021 -0700

    themes: work around broken distro themes
    
    In particular PopOS sandboxed themes are broken from what I see on
    Flathub.
    
    Related #1443

 src/libide/themes/themes/shared/shared-editor.css | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/libide/themes/themes/shared/shared-editor.css 
b/src/libide/themes/themes/shared/shared-editor.css
index a8b2e0be5..86652a010 100644
--- a/src/libide/themes/themes/shared/shared-editor.css
+++ b/src/libide/themes/themes/shared/shared-editor.css
@@ -142,3 +142,9 @@ textview:not(:focus) text {
   caret-color: transparent;
   -gtk-secondary-caret-color: transparent;
 }
+
+
+vte-terminal {
+  background-color: @content_view_bg;
+  color: @theme_fg_color;
+}