Add "preventScroll" option to tm-focus-selector message (#4157)

* add "delayed" option to tm-focus-selector message

this delays the focussing for the time of the animation duration if delayed="yes" or delayed="true"

this is useful when navigating the story river up and down with keyboard shortcuts and the shortcuts focus the title input if a navigated tiddler is in edit mode -> navigation doesn't jump but stays smooth

* Update rootwidget.js

* Update WidgetMessage_ tm-focus-selector.tid

* add preventScroll="true" tip

core/modules/startup/rootwidget.js

@@ -44,7 +44,7 @@ exports.startup = function() {
 			console.log("Error in selector: ",selector)
 		}
 		if(element && element.focus) {
-			element.focus();
+			element.focus(event.paramObject);
 		}
 	});
 	// Install the scroller

editions/tw5.com/tiddlers/messages/WidgetMessage_ tm-focus-selector.tid

@@ -9,4 +9,6 @@ The `tm-focus-selector` message sets the focus to the DOM element identified by
 
 |!Name |!Description |
 |param |Selector identifying the DOM element to be focussed  |
+|paramObject |Optional hashmap of additional parameters passed to the `focus` command |
 
+<<.tip """preventScroll="true" prevents the browser from scrolling to the focused element""">>