* feat: extend tm-open-window to allow opening the same tiddler in multiple templates, and introduce tm-close-window to close browser windows
* fix: use a windowID parameter to uniquely identify a window and introduce tm-close-all-tiddlers
* fix: whitespace
* fix: update variable
* feat: extend tm-open-window to support optional top and left position for new browser window
* fix: whitespace correction
* Update WidgetMessage_ tm-open-window.tid