Feature/server settings (#458)

* Move "Server Address" setting to server settings

* Rename "ServerDirSetting" to "TextSetting"

* Use "TextSetting" for server address

* Reset value when closing the dialog

* Support passwords in "TextSetting"

* Add server settings

src/lib/graphql/Fragments.ts

@@ -455,5 +455,8 @@ export const SERVER_SETTINGS = gql`
         backupTime
         backupInterval
         backupTTL
+
+        # local source
+        localSourcePath
     }
 `;