[gnome-boxes/readd-vnc-read-only-option] Revert "vnc-display: Do not expose "Read only" option"

[Felipe Borges <felipeborges src gnome org>]

commit e6670637e7c8bd5607edcdfd67dd1eba9c9737b6
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Dec 16 16:07:58 2019 +0100

    Revert "vnc-display: Do not expose "Read only" option"
    
    This reverts commit a2ebfb47c3af42e61ab5890de2214c9bc51f0916.
    
    Issue #445 presents a compelling case for us to expose the option.
    
    Fixes #445

 src/vnc-display.vala | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/src/vnc-display.vala b/src/vnc-display.vala
index 55244a1a..bf639a86 100644
--- a/src/vnc-display.vala
+++ b/src/vnc-display.vala
@@ -145,6 +145,16 @@ public override void disconnect_it () {
     public override List<Boxes.Property> get_properties (Boxes.PropertiesPage page) {
         var list = new List<Boxes.Property> ();
 
+        switch (page) {
+        case PropertiesPage.GENERAL:
+            var toggle = new Gtk.Switch ();
+            toggle.halign = Gtk.Align.START;
+            display.bind_property ("read-only", toggle, "active",
+                                   BindingFlags.BIDIRECTIONAL | BindingFlags.SYNC_CREATE);
+            add_property (ref list, _("Read-only"), toggle);
+            break;
+        }
+
         return list;
     }