Sketch 85 Compatibility

[sonburn]

A few fixes to make the plugin work again, might not be everything but it's the core stuff...

• Fix for userInfo not being applied to connections group. Removing the pluginIdentifier solved the problem, and it's not necessary Sketch applies the plugin invoking the action as identifier by default.
• Fix for "doc.selectedLayers().layers is not a function". Dropping .layers() solved the problem.
• Fix for "Can't find variable: MSLayerArray". Removed MSLayerArray.arrayWithLayers and simply passing the layer objects seems to work fine.
• Fix for "connectionsGroup.deselectLayerAndParent is not a function". Simply removed this function, without it the user selections are retained despite the folder being added.