shorten a bunch of properties via observers
SBDownloadView
SBDownloadsView
SBSplitView
move some protocol definitions to swift files
fix outdated declaration
SBReportView
delegate -> sbDelegate
SBInnerView (monumental)
SBFixedSplitView
SBSearchbar
replace some overlooked >0s with !isEmpty
SBFindbar
SBTableCell
SBConstrain