Change UX of the auto-update feature

Use radio button and better tooltips to explain the feature and avoid missunderstandings.
Fixes #150
See #102

SoundSwitch/Properties/SettingsString.fr.resx

@@ -178,4 +178,16 @@
 	<data name="keepSystrayIcon" xml:space="preserve">
 		<value>Garder l'icone intacte</value>
 	</data>
+	<data name="autoInstall" xml:space="preserve">
+		<value>Auto-Install</value>
+	</data>
+	<data name="autoInstallHelp" xml:space="preserve">
+		<value>Télécharge et installe les mis à jours sans que vous deviez intéragir avec l'application.</value>
+	</data>
+	<data name="checkUpdate" xml:space="preserve">
+		<value>Vérifie les MàJ</value>
+	</data>
+	<data name="checkUpdateHelp" xml:space="preserve">
+		<value>Vérifie la présence d'une nouvelle version. Si c'est le cas, prévient l'utilisateur.</value>
+	</data>
 </root>

SoundSwitch/Properties/SettingsString.resx

@@ -178,4 +178,16 @@
 	<data name="keepSystrayIconHelp" xml:space="preserve">
 		<value>If selected, the Systray Icon won't change when the default device changes.</value>
 	</data>
+	<data name="autoInstall" xml:space="preserve">
+		<value>Auto-Install</value>
+	</data>
+	<data name="autoInstallHelp" xml:space="preserve">
+		<value>Download and update the application in the background without needing any user interaction.</value>
+	</data>
+	<data name="checkUpdate" xml:space="preserve">
+		<value>Check for Update</value>
+	</data>
+	<data name="checkUpdateHelp" xml:space="preserve">
+		<value>Check periodically if there is an update. When found, notify the user of the update.</value>
+	</data>
 </root>