more complaints, and mac user stuff

[ ] mac users use cmd instead of shift as their usual "add to selection" combo
[ ] investigate double click context menu for mac users
[ ] fix bug where edges form between new nodes that weren't drag+dropped
[ ] small vs medium participant icons still doesn't work
[ ] delete doesn't work on mac
[ ] should add remove to context menu when right/double clicking on a node
[ ] clicking out of a variable/function input creates it as empty.
[ ] need to explain that only boolean type variables can be "locked"
[ ] need a guide to the options in the top-right
[ ] add alternis logo in the app to go to the website
[ ] fix scroll bars in chrome
[ ] fix one pixel of scroll space :/

alternis-io / AlternisFlow-WebEditor