Refactor widgets

- Move widget templates to subfolder
- Add new generic filter widget templates to replace category, network and filer filters
- Update styles

mod/cal.php

@@ -59,7 +59,7 @@ function cal_init(App $a)
 
 	$account_type = Contact::getAccountType($profile);
 
-	$tpl = Renderer::getMarkupTemplate("vcard-widget.tpl");
+	$tpl = Renderer::getMarkupTemplate("widget/vcard.tpl");
 
 	$vcard_widget = Renderer::replaceMacros($tpl, [
 		'$name' => $profile['name'],