Add Reactix.preventDefault/stopPropagation

* #174
* FormValidation hook
* StateRecord hook
* Bootstrap component (button, formInput, formTextarea, baseModal,
spinner, button)
* enhanced SASS members

* #314: Folder View: Split Horizontal / Vertical for folder or code views
* Sidebar UI/UX enhancement
* SASS members addition for left/right handling
* link handling hook interface

Also, spago build used now.

Not everything compiles yet.

Use thisModule everywhere.

Changed contacts, rename node, corpus code file name to use input field
where enter confirms the edition.

Now focus works.

Now focus works.

Also, html code element edits text properly (no state, just refs which
prevents cursor jumping).