[gnome-builder] create-project: fix styling for template flow box child

[Christian Hergert <chergert src gnome org>]

commit ef52cfc1e3721ee27963d38dc717044913b5ecb1
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jan 22 12:14:14 2019 -0800

    create-project: fix styling for template flow box child

 src/plugins/create-project/create-project.gresource.xml |  1 +
 src/plugins/create-project/themes/shared.css            | 11 +++++++++++
 2 files changed, 12 insertions(+)
---
diff --git a/src/plugins/create-project/create-project.gresource.xml 
b/src/plugins/create-project/create-project.gresource.xml
index 0174828ee..cd061bf4e 100644
--- a/src/plugins/create-project/create-project.gresource.xml
+++ b/src/plugins/create-project/create-project.gresource.xml
@@ -5,6 +5,7 @@
     <file preprocess="xml-stripblanks">gbp-create-project-surface.ui</file>
     <file preprocess="xml-stripblanks">gbp-create-project-template-icon.ui</file>
     <file>create-project.plugin</file>
+    <file>themes/shared.css</file>
   </gresource>
 
   <gresource prefix="/plugins/create-project/license/full">
diff --git a/src/plugins/create-project/themes/shared.css b/src/plugins/create-project/themes/shared.css
new file mode 100644
index 000000000..4442ae40b
--- /dev/null
+++ b/src/plugins/create-project/themes/shared.css
@@ -0,0 +1,11 @@
+.greeter flowboxchild {
+  border-radius: 11px;
+  outline-offset: -3px;
+  -gtk-outline-radius: 9px;
+  min-width: 164px;
+  min-height: 164px;
+}
+
+.greeter flowboxchild:selected label {
+  color: @theme_selected_fg_color;
+}