Fullscreen mode for Google Tasks widget

Enables fullscreen mode for Google Tasks widget to simplify management of long task lists. Dozens of items in Google Tasks are not easy manageable just in the sidebar. Long task names, subtasks, dates, links to context - reordering is a pain, you see just several items and have to scroll in this narrow panel to sort the list properly. This widget adds a fullscreen button that takes exactly the same widget and just opens it in a new tab. Much easier to reorder your work!