dynamically create panels

here is the dynamic creation part for #599
still need somewhere to load custom panels from
minor reformat
rename load to load_options .js
clarify logic
move help disabling to help frame object
refactor for dynamic loading of panels

move all panel initialization from init to load_options (later: modularize)
run panel configuration before loading notebook (nix dumb promise)
safe handling of errors before session_pane initialized

skip posting and console log it instead
add jquery.whiny for detecting broken selectors

will disable for release
move more panel initialization to load_options

now it's time to modularize!
split out more panel initialization to components
move out panel sizers to components
fully modularized panels

closes #599

all initialization and parameters come from the frame objects
panel loader init still hard-codes a list but it can be added to
make scratchpad tolerant of there being no scratchpad (?)
eliminate a warning when there is no search pane
sortable and skippable panels

you can set their sort index and skip flag in panel_loader (before they're loaded)
hide panel heading content automatically

the last special case (?!)
create adder for panel loader
Merge branch 'abstract-panels' into develop

also, align comment button with top of entry

Conflicts:
	htdocs/edit.html
	htdocs/js/rcloud_bundle.min.js