Group UI & Improvements

Framework

• refactor identifier to groups
• allow ungrouped instances
• support different max count in a group as the sum of all its entries max counts

Dashboard

• add color indicator to mark entries as leak
• display groups instead of standalone items
• support orientation changes
• snap an expanded dashboard back to the bottom if it reached the bottom of the screen before
• order entries descending after their offset between maxCount and count
• fix empty space between dashboard and device bottom during the initial opening

Small other things

• reduce magic number and strings usage
• fix Xcode warnings
• change example app background color to be different than the dashboard view
• add NSObject leaks to example project