Feature bloat in side menus

[johnmartins]

As more features are added, it is no longer feasible to keep adding new blocks into the side menus. Proposed solutions:

• Add an analysis tab for future analysis functions
• Make side menu groups collapsable, and collapse all but the essential functionality by default
• Move our category editing from the side menu, OR make category editing "swap out" the entire side menu

[johnmartins]

• Reuse collapsable menu components from Morpheus
• Hide least used sections initially (e.g. exports, graphical options)
• Add menu tabs, as in morpheus? E.g. one tab for analysis, another for import/export, third for manupulation

[johnmartins]

A step towards solving this was taken in version 1.10 (#83) by introducing collapsible menu components.

For the future, it may be worth considering implementing menu tabs, too