SpaceRadar v4.4.0

This release features the popularly requested Treemaps.

This may contains minor bugs and the intention is to get early feedback. (Treemaps colors and transition animations are not finalized)

Also in this release is

• Memory monitoring
• Mac App styling
• Context Menus for locating + opening + deleting files / directories
• Navigation controls (back/fwd/up)
• Improved loading performance (using invisible renderer process)

More notes can be found in this PR