Rename 'restore' option

This could be confusing for people using Syncthing as a backup
solution, apparently. Replace with 'Open SyncTrayzor', which is
more in line with what other applications do.

Fixes #320

src/SyncTrayzor/NotifyIcon/TaskbarIconResources.xaml

@@ -91,7 +91,7 @@
                     <s:BoolToVisibilityConverter x:Key="RestoreVisibility" TrueVisibility="Collapsed" FalseVisibility="Visible"/>
                 </ContextMenu.Resources>
                 <!-- TaskbarIcon starts by setting the DataContext to itself, so just ignore this... -->
-                <MenuItem Header="{l:Loc TrayIcon_Menu_Restore}" Command="{s:Action Restore, ActionNotFound=Disable}"
+                <MenuItem Header="{l:Loc TrayIcon_Menu_Restore}" FontWeight="Bold"  Command="{s:Action Restore, ActionNotFound=Disable}"
                           Visibility="{Binding MainWindowVisible, Converter={StaticResource RestoreVisibility}}"/>
                 <MenuItem Header="{l:Loc TrayIcon_Menu_CloseToTray}" Command="{s:Action Minimize, ActionNotFound=Disable}"
                           Visibility="{Binding MainWindowVisible, Converter={x:Static s:BoolToVisibilityConverter.Instance}}"/>

src/SyncTrayzor/Properties/Resources.resx

@@ -383,7 +383,7 @@ Details on each component, and its license text, are shown below.</value>
     <comment>Menu option available when right-clicking the tray icon. Instructs SyncTrayzor to exit</comment>
   </data>
   <data name="TrayIcon_Menu_Restore" xml:space="preserve">
-    <value>_Restore</value>
+    <value>_Open SyncTrayzor</value>
     <comment>Menu option available when right-clicking the tray icon. Instructs SyncTrayzor to restore itself from the tray, and be visible to the user</comment>
   </data>
   <data name="TrayIcon_Menu_Settings" xml:space="preserve">
@@ -470,7 +470,7 @@ SyncTrayzor is going to have to close. Sorry about that</value>
     <value>R_estart</value>
   </data>
   <data name="TrayIcon_Menu_RestartSyncthing" xml:space="preserve">
-    <value>R_estart Syncthing</value>
+    <value>_Restart Syncthing</value>
     <comment>Menu option available when right-clicking the tray icon. Instructs SyncTrayzor to restart</comment>
   </data>
   <data name="SettingsView_Tab_Syncthing" xml:space="preserve">
@@ -488,7 +488,7 @@ SyncTrayzor is going to have to close. Sorry about that</value>
     <value>Stop Syncthing from auto-upgrading. This is useful if a new version of Syncthing breaks compatibility with SyncTrayzor. You will need to downgrade the syncthing.exe file in SyncTrayzor's config folder</value>
   </data>
   <data name="TrayIcon_Menu_OpenFolder" xml:space="preserve">
-    <value>_Open Folder</value>
+    <value>Open _Folder</value>
     <comment>Menu option available when right-clicking the tray icon. Is a header for a list of folders, each of which can be clicked to open it in Explorer</comment>
   </data>
   <data name="ViewerView_OpenFolder" xml:space="preserve">