Overview for Filament manager#332

It could be really helpful for us to have a different overview of your warehouse of filaments. With 100+ spools, graphically identical except for the name/color, it’s a bit hard to have an idea of the overall quantities.
What I imagine it could be helpful for us:

• different “views” of your spools, in order to zoom out to a list or zoom in to a detailed view
• statistics about usage, maybe sort by type or color etc
• notification when you are running out of a particular type of filament
• Possibility to export data in .csv file