Tree-like objective node structure (#7152)

* overall structure

* overall layout

* field interpreter

* less bloated UI

* scroll pan't

* strip off the 'Marker' suffix

* e

* all (hopefully all...) interpreters finished.

* onset

* two, four

* i don't understand how icon mappings work.

* separate remover and indexer

* some cleanups

* untested mobile support

* contrib

* ok anuke

* fix conflicts 2

* hidden

core/assets/contributors

@@ -146,3 +146,4 @@ Alex25820
 KayAyeAre
 SMOLKEYS
 1stvaliduser(SUS)
+GlennFolker