added style

app/ui/main_app_window.py

@@ -277,6 +277,11 @@ class Application(Gtk.Application):
         d_elements = (self._SERVICE_ELEMENTS, self._BOUQUET_ELEMENTS, self._COMMONS_ELEMENTS, self._FAV_ELEMENTS,
                       self._FAV_ENIGMA_ELEMENTS, self._FAV_IPTV_ELEMENTS, self._LOCK_HIDE_ELEMENTS)
         self._tool_elements = {k: builder.get_object(k) for k in set(chain.from_iterable(d_elements))}
+        # Style
+        self._style_provider = Gtk.CssProvider()
+        self._style_provider.load_from_path(UI_RESOURCES_PATH + "style.css")
+        self._status_bar_box.get_style_context().add_provider_for_screen(Gdk.Screen.get_default(), self._style_provider,
+                                                                         Gtk.STYLE_PROVIDER_PRIORITY_USER)
 
     def do_startup(self):
         Gtk.Application.do_startup(self)

app/ui/main_window.glade

@@ -28,6 +28,7 @@ Author: Dmitriy Yefremov
 -->
 <interface>
   <requires lib="gtk+" version="3.16"/>
+  <!-- interface-css-provider-path style.css -->
   <!-- interface-license-type mit -->
   <!-- interface-name DemonEditor -->
   <!-- interface-description Enigma2 channel and satellites list editor for GNU/Linux. -->
@@ -2797,7 +2798,7 @@ Author: Dmitriy Yefremov
         </child>
         <child>
           <object class="GtkBox" id="status_bar_box">
-            <property name="height_request">35</property>
+            <property name="height_request">30</property>
             <property name="can_focus">False</property>
             <child>
               <object class="GtkBox" id="receiver_info_box">
@@ -2921,9 +2922,13 @@ Author: Dmitriy Yefremov
                 </child>
                 <child>
                   <object class="GtkButton" id="play_current_service_button">
+                    <property name="name">status-bar-button</property>
                     <property name="can_focus">False</property>
+                    <property name="focus_on_click">False</property>
                     <property name="receives_default">True</property>
                     <property name="tooltip_text" translatable="yes">Play</property>
+                    <property name="halign">center</property>
+                    <property name="valign">center</property>
                     <signal name="clicked" handler="on_watch" swapped="no"/>
                     <child>
                       <object class="GtkImage" id="play_current_service_image">

app/ui/style.css

@@ -1,3 +1,8 @@
 #digit-entry {
     border-color: Red;
 }
+
+#status-bar-button {
+  padding: 1px;
+  margin: 1px;
+}