fix(ui5-list): preventing space keydown (#4088)

Preventing the Space key on keydown is redundant since it should be already handled in its children separately.

Fixes: #4049

Author: nnaydenow

packages/main/src/List.js

@@ -734,9 +734,6 @@ class List extends UI5Element {
 	}
 
 	_onkeydown(event) {
-		if (isSpace(event)) {
-			event.preventDefault(); // prevent scroll
-		}
 		if (isTabNext(event)) {
 			this._handleTabNext(event);
 		}