Revert "Don't include manifest when not available (#13789)"

This reverts commit d5953571c49c36aec20f57cdc75498ed51bb535c.

Conflicts:
	vaadin-touchkit-agpl/src/main/java/com/vaadin/addon/touchkit/settings/ApplicationCacheSettings.java

Change-Id: If0b48f3f3c88232cc6dc1330d16513439c1400d7
Hide "maximise" button from Popover (#13947)

Change-Id: Iead973897993745b5d6fcfe6d82dea83c77333ee