Add relation list to default sidebar

[vsandre]

At the moment the sidebar consits of layer list, properties, selection and undo list if you create a new profile. Please drop the undo list and insert the relation list in the defaults, because it used more often.

[bastiK]

JOSM remembers the open dialogs from last time. So the default selection is mainly to give orientation for newbies.

Including the relation dialog would give the impression that you have to understand relations before you can do any mapping. However I think a beginner can ignore this topic more or less and still make good contributions.

[vsandre]

You are right, if you say josm saves its configuration. But check your configuration, is the undo list always active? The decision to do not show relations is outdated, because they become more important, e.g. Split a way which is part of a route relation. You do not have to know what relations are, but if you see them by default you will learn to use them step by step. (Box with warning -> OH there is a sidebar dialogue with the name relation -> ...)

Please let it open for more opinions.

[skyper]

I second this.