Fixed some shortcut display issues

Also give FileChooserNative arguments in the right order & add F5 to refresh

hammond-gtk/resources/gtk/help-overlay.ui

@@ -6,13 +6,23 @@
       <object class="GtkShortcutsSection">
         <property name="section-name">shortcuts</property>
         <property name="max-height">12</property>
+        <property name="visible">True</property>
         <child>
           <object class="GtkShortcutsGroup">
-            <property name="title" translatable="yes">Miscellaneous</property>
+            <property name="title" translatable="yes">General</property>
+            <property name="visible">True</property>
             <child>
               <object class="GtkShortcutsShortcut">
+                <property name="visible">True</property>
+                <property name="accelerator">F5</property>
+                <property name="title" translatable="yes" context="shortcut window">Check for new episodes</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">True</property>
                 <property name="accelerator">&lt;primary&gt;q</property>
-                <property name="title" translatable="yes">Quit</property>
+                <property name="title" translatable="yes" context="shortcut window">Quit the application</property>
               </object>
             </child>
           </object>

hammond-gtk/resources/gtk/menus.ui

@@ -6,6 +6,7 @@
       <item>
         <attribute name="label" translatable="yes">_Check for new episodes</attribute>
         <attribute name="action">app.refresh</attribute>
+        <attribute name="accel">F5</attribute>
       </item>
       <item>
         <attribute name="label" translatable="yes">_Import Shows</attribute>