Allow sidebar in queries (single state)

[ItsOnlyBinary]

closes #685
closes #818

[ItsOnlyBinary]

Squashed and rebased

[ItsOnlyBinary]

rebased

[CoryChaplin]

Is it wanted to remove sidebar.toggle ?

[ItsOnlyBinary]

showSidebar() is unused from what i can tell. If thats what your referring to

[prawnsalad]

In sidebarstate.js line 28

        this.listen(this.$state, 'sidebar.component', (component) => {
            this.activeComponent = component;
            this.sidebarOpen = !!component;
            this.sidebarSection = '';
        });

If component is truthy it could do with setting this.sidebarSection = 'component' so that it will stay open. Looking at the rest of the file it looks like that's all that's needed... I think

[prawnsalad]

I think the logic in SidebarState.js has become a little unwieldy with the changes it got over time which makes extending it a little awkward. It works as it is which is fine but I think we should draw out the logic for what it should actually do and how it decides what section to show and essentially re-write this files logic. The logic drawn out will also be documenting it for future as it's difficult to follow currently.

Just waiting on confirmation that this works with plugins from elephantman before merging.

[CoryChaplin]

@prawnsalad tested the latest version of this and it works well including with a sidebar inside queries coming from a plugin.
👍 from me and great work @ItsOnlyBinary !