[gnome-builder/gnome-builder-41] editor: add source-map style to overview map

[Christian Hergert <chergert src gnome org>]

commit b32ce77fa74d635f1348a899c73641a32bf1396d
Author: Christian Hergert <chergert redhat com>
Date:   Thu Nov 18 12:22:24 2021 -0800

    editor: add source-map style to overview map

 src/libide/editor/ide-editor-page.ui | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/libide/editor/ide-editor-page.ui b/src/libide/editor/ide-editor-page.ui
index 1306575bc..7a4227383 100644
--- a/src/libide/editor/ide-editor-page.ui
+++ b/src/libide/editor/ide-editor-page.ui
@@ -114,6 +114,9 @@
             <child>
               <object class="GtkSourceMap" id="map">
                 <property name="visible">false</property>
+                <style>
+                  <class name="source-map"/>
+                </style>
               </object>
             </child>
           </object>