Encryption and One-Way-Control (#200)

This is a major rewrite of the core networking logic enabling one-way control and encryption through the webrtc-dtls crate.

closes #164 
closes #104

lan-mouse-gtk/src/key_row.rs

@@ -0,0 +1,48 @@
+mod imp;
+
+use adw::prelude::*;
+use adw::subclass::prelude::*;
+use gtk::glib::{self, Object};
+
+use super::KeyObject;
+
+glib::wrapper! {
+    pub struct KeyRow(ObjectSubclass<imp::KeyRow>)
+    @extends gtk::ListBoxRow, gtk::Widget, adw::PreferencesRow, adw::ExpanderRow,
+    @implements gtk::Accessible, gtk::Actionable, gtk::Buildable, gtk::ConstraintTarget;
+}
+
+impl Default for KeyRow {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl KeyRow {
+    pub fn new() -> Self {
+        Object::builder().build()
+    }
+
+    pub fn bind(&self, key_object: &KeyObject) {
+        let mut bindings = self.imp().bindings.borrow_mut();
+
+        let title_binding = key_object
+            .bind_property("description", self, "title")
+            .sync_create()
+            .build();
+
+        let subtitle_binding = key_object
+            .bind_property("fingerprint", self, "subtitle")
+            .sync_create()
+            .build();
+
+        bindings.push(title_binding);
+        bindings.push(subtitle_binding);
+    }
+
+    pub fn unbind(&self) {
+        for binding in self.imp().bindings.borrow_mut().drain(..) {
+            binding.unbind();
+        }
+    }
+}