updates:
- deprecating version_2 directory
- deprecating version_3 directory
- splitting the current navigation and actions elements into cleared elements
	* global navigation (always present)
	* sidebar navigation present only when more local navigation is needed (e.g. settings)
	* actions are kept in the "page" content (i.e. main pane)
- updating global navigation to reflect
	* keyring
	* settings
- keyring_display-all-keys page
	* removing side navigation as it's not needed in this view
	* moving all actions (import, generate keys) into keyring main content pane
	* adding export all keys action into main pane
	* adding "actions" button into each table row which allows
		* exporting of public/public and private keys
		* deletion of public/public and private keys
		* displaying of public/public and private keys
			* modals for these actions are not yet created
- settings_composing page
	* side nav is created, main actions pane is not ready. Currently only shows holder text
- settings_security page
	* side nav is created, main actions pane is not ready. Currently only shows holder text
- security_watchlist page
	* side nav is created, main actions pane is not ready. Currently only shows holder text