id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
21970	Only activate data layer loading a session	skyper	team	"==== What steps will reproduce the problem?
1. Have a data layer
1. Load a session only containing imagery layers

==== What is the expected result?
The data layer stays active

==== What happens instead?
An imagery layer from the session is activated

==== Please provide any additional information below. Attach a screenshot if possible.
Did not test with other layers like gpx (#21967)

{{{
Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2022-03-24 10:16:44 +0100 (Thu, 24 Mar 2022)
Revision:18417
Build-Date:2022-03-25 02:30:55
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (18417 en) Linux Debian GNU/Linux 11 (bullseye)
Java version: 17.0.2+8-Debian-1deb11u1, Debian, OpenJDK 64-Bit Server VM
}}}
"	enhancement	new	normal		Core			template_report session active layer imagery