[gnome-panel] libgnome-panel: add css class to GpImageMenuItem

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 562e9e818217878ec578509a4c956ad9e068396b
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Mar 25 13:43:36 2018 +0300

    libgnome-panel: add css class to GpImageMenuItem

 data/theme/common.css               |   26 +++++++++++++-------------
 libgnome-panel/gp-image-menu-item.c |    4 ++++
 2 files changed, 17 insertions(+), 13 deletions(-)
---
diff --git a/data/theme/common.css b/data/theme/common.css
index f31fb83..c170c43 100644
--- a/data/theme/common.css
+++ b/data/theme/common.css
@@ -1,32 +1,32 @@
-menuitem image {
+.gp-image-menu-item > image {
   min-height: 16px;
   min-width: 16px;
 }
 
-menuitem image:dir(ltr) {
-  margin-right: 7px;
+.gp-image-menu-item > image:dir(ltr) {
+  margin-right: 5px;
 }
 
-menuitem image:dir(rtl) {
-  margin-left: 7px;
+.gp-image-menu-item > image:dir(rtl) {
+  margin-left: 5px;
 }
 
-panel-toplevel.left gp-applet > menubar > menuitem > image:dir(ltr) {
+panel-toplevel.left gp-applet > menubar > .gp-image-menu-item > image:dir(ltr) {
   margin-right: 0px;
-  margin-top: 7px;
+  margin-top: 5px;
 }
 
-panel-toplevel.left gp-applet > menubar > menuitem > image:dir(rtl) {
+panel-toplevel.left gp-applet > menubar > .gp-image-menu-item > image:dir(rtl) {
   margin-left: 0px;
-  margin-bottom: 7px;
+  margin-bottom: 5px;
 }
 
-panel-toplevel.right gp-applet > menubar > menuitem > image:dir(ltr) {
+panel-toplevel.right gp-applet > menubar > .gp-image-menu-item > image:dir(ltr) {
   margin-right: 0px;
-  margin-bottom: 7px;
+  margin-bottom: 5px;
 }
 
-panel-toplevel.right gp-applet > menubar > menuitem > image:dir(rtl) {
+panel-toplevel.right gp-applet > menubar > .gp-image-menu-item > image:dir(rtl) {
   margin-left: 0px;
-  margin-top: 7px;
+  margin-top: 5px;
 }
diff --git a/libgnome-panel/gp-image-menu-item.c b/libgnome-panel/gp-image-menu-item.c
index 5551337..d9080a3 100644
--- a/libgnome-panel/gp-image-menu-item.c
+++ b/libgnome-panel/gp-image-menu-item.c
@@ -331,6 +331,10 @@ gp_image_menu_item_class_init (GpImageMenuItemClass *item_class)
 static void
 gp_image_menu_item_init (GpImageMenuItem *item)
 {
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (item));
+  gtk_style_context_add_class (context, "gp-image-menu-item");
 }
 
 /**