Reduce cruft in infrastructure

[t3kt]

• [x] Unused settings in inputHandler
• [x] Parts of inputHandler that are only relevant in devel (i.e. docs)
• [x] Stage init code
• [x] Centralize shared tables with buildLock for selected instances
• [ ] Get rid of property inference in inputHandler and specify all input names explicitly
• [ ] Alternative coord types for field inputs which can be replaced with variables