group small branches in 'other' group

[bmesuere]

From Peter:

• automatically bundle "other" group (which can be expanded upon request)
  • show at most x children and bundle remaining children in "other",
  • only show children that have a certain abundance, and bundle remaining children in "other"

problems:

• Clicking on other would reveal the real nodes and not show its children. This might be confusing
• The �other� node should stand out visually from normal nodes
• Children are now sorted alphabetically. Expanding an other node might insert new children elsewhere. Sorting by size might fix this.
• Think out an algorithm

Original issue by @bmesuere on Fri Aug 08 2014 at 18:43.