Viewport rotation support in sheet space

Multifunctional Grips support for PolyLine segment and Vertex

<Esc> key handling to close palettes and dialogs

Improvement : Combo box icon size has been increased for better visibility

Improvement : Added a limitation to allowed number of characters for all types of files and folders, including templates, fonts, etc. to 250 characters

Generic crashes have been fixed

Stabilization of Dynamic Grip, ViewPort, CBConvert, Ribbon, SNAP and CloudField