Toolbar action w/o name in measurement plugin

[rickmastfan67]

Just happened to discover this minor bug with the plugin. Here's the steps to reproduce it:

1) Start with a completely fresh profile for JOSM and download just the 'measurement' plugin.
2) Restart JOSM so the plugin is activated.
3) Once JOSM has been restarted, download a small area of data.
4) Hit your 'F12' button to access your preferences.
5) Select the 'Toolbar customization' section on the left.

What happens:
If you have the command line open for JOSM, you see the following toolbar action error:

INFO: Toolbar action without name: org.openstreetmap.josm.plugins.measurement.MeasurementMode

What should happen:
This error shouldn't happen.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-03-15 02:11:02 +0100 (Sun, 15 Mar 2020)
Build-Date:2020-03-15 01:14:46
Revision:16130
Relative:URL: ^/trunk

Identification: JOSM/1.5 (16130 en) Windows 7 64-Bit
OS Build number: Windows 7 Professional (7601)
Memory Usage: 810 MB / 1820 MB (663 MB allocated, but free)
Java version: 1.8.0_201-b09, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080

Plugins:
+ measurement (35248)

[Don-vip]

In 16138/josm:

see #18933 - toolbar code refactoring

[Don-vip]

Fixed in [o35368:35370].