- Move UI code to glade file
- Remove use of deprecated widgets
- Rename some widgets

- Remove Server URL entry field
- Dont use deprecated widgets anymore

This inlcudes slight refactoring and switch to https instead of ftps

Certificate is only on python >= 3.4 verified

added ability to do periodic plugin update checks (every 24 hours) and resized window to fit omemo plugin name properly

PluginInstallerPlugin.fix gtk warning(gdk_window_invalidate_rect_full: assertion `GDK_IS_WINDOW (window)' failed)

add plugins from trunk: banner_tweaks, google_translation, length_notifier, plugin_installer, triggers, whiteboard