Set plugin icon to 24x24 regardless of the file size

safeeyes/glade/item_plugin.glade

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.18.3 -->
+<!-- Generated with glade 3.22.2 -->
 <!--
 ~ Safe Eyes is a utility to remind you to take break frequently
 ~ to protect your eyes from eye strain.
@@ -39,6 +39,10 @@
         <property name="can_focus">False</property>
         <property name="halign">center</property>
         <property name="valign">center</property>
+        <property name="margin_left">2</property>
+        <property name="margin_right">2</property>
+        <property name="margin_top">2</property>
+        <property name="margin_bottom">2</property>
         <property name="stock">gtk-about</property>
       </object>
       <packing>

safeeyes/ui/settings_dialog.py

@@ -220,7 +220,11 @@ class SettingsDialog:
         if plugin_config.get('break_override_allowed', False):
             self.plugin_map[plugin_config['id']] = plugin_config['meta']['name']
         if plugin_config['icon']:
-            builder.get_object('img_plugin_icon').set_from_file(plugin_config['icon'])
+            pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_scale(plugin_config['icon'],
+                                                             width=24,
+                                                             height=24,
+                                                             preserve_aspect_ratio=False)
+            builder.get_object('img_plugin_icon').set_from_pixbuf(pixbuf)
         if plugin_config['settings']:
             btn_properties.set_sensitive(True)
             btn_properties.connect('clicked', lambda button: self.__show_plugins_properties_dialog(plugin_config))