added instance caching for renderer creation
added routine to avoid using wrapper for Threads renderer if using full layout
improved Threads renderer modularization
v2.4.5 — version bump
improved Widget Page layout editor and rendering
improved Widget Page rendering: vertical layout with 1 child
improved Widget Page rendering: optimize CSS generation
improved Widget Page rendering: fix margin for deep layout
improved Widget Page rendering: increase decimal for percentage (for big screen)
added support for sidebar widgets in Widget Page
added $widgets array for css generation
v2.4.5b — version bump