toolbar unit tests
supplementary view
rename label class
supplementary view kind strings. register supplementary view nibs.
fix default items in section
fix nib bug
edit supplementary view constants
edit collection view setup
remove default item size
clean up flowlayout
remove supplementary view
remove refs to supplementary view
clean up imports
minor edits
refactor delegate for pressing send and accessory buttons.
refactor layout properties. fix scroll to bottom issue.