* feat: option to allow click on modalBackdrop to close modal
* feat: allow switcher modals closable
* feat: allow use caption field as modal title
* refactor: make maskClosable a variable
* fix: use "true"
* fix: code style
* docs: add description about maskClosable
* fix: convention is to have double quotes for strings in the TW core
* refactor: using a "mask-closable" field on the modal tiddlers instead of as a message parameter
* docs: move to modal tid
* Update WidgetMessage_ tm-modal.tid
Update documentation for modals to include the custom class introduced in #4485, as well as the footer and subtitle fields that don't appear to be documented.
