Quantity editor component library

Building a metainfo-based editor (#743 (closed), #742 (closed), #744 (closed)) is much either with an existing library of different basic quantity editor components.

• text fields for strings
• autocomplete fields for enums
• checkbox/radio button arrays for enums
• text fields with unit for numbers
• range slider with unit for numbers
• date selector, time selector, duration selector
• autocomplete selection component to choose referenced data
• a grid component to create horizontal/vertical groups

component to build tables/lists of the above for quantities with non trivial shapes

• fixed length list of numbers
• fixed length list of strings
• fixed length list of booleans