Performance and Style Fix

- DONE Add Schema to retrieve limited amount of data
- DONE Recursive child retrieve in 2 time instead of (n)
- DONE in overflow menu bottom of page when still not at end of page
- FIXED Recursive Menu, with empty data keep showing 'loading'
- DONE validation message should not show in error menu
- FIXED on click position changes, sometime not placed on right spot,
page width still extends
- processed feedback form Chris de Gelder
Performance Fix and MF data source

Performance Fix and MF data source
Revert "Performance Fix and MF data source"

This reverts commit d7746344cd5d56daaea362150938f4f8a58fb167.
Revert "Revert "Performance Fix and MF data source""

This reverts commit 0f0f7464c9158d7df45876b1219851f60bf9d169.