Override method to copy entity. Must return the copy

Override method to delete entity

Override method to do new entity logic. Must return the new entity

Override method to rename an entity

Gets border widths to better determine page size in ShowActive()

Creates bitmap for tab Takes the bitmaps already set and replaces a known color (black) with the needed color, while als

Determines colors used for tab, based on system settings

Initializes regions for tab, which makes it easier to determine if given coordinates are included in a region

Used with keyboard shortcut for next page navigation

Destroy drag information (GH issue #479)