Revert "Keep the selection on drop"

Note: It creates additional paragraphs when dragging non editable blocks.

This reverts commit bef6be3.

tinymce-single/tinymce/block.js

@@ -361,7 +361,7 @@
 			editor.buttons.link.icon = 'gridicons-link';
 
 			var blockToolbarWidth = 0;
-			var beforeSelection;
+
 			function createBlockOutline( hover ) {
 				var outline = document.createElement( 'div' );
 				var handleLeft = document.createElement( 'div' );
@@ -381,7 +381,6 @@
 
 				DOM.bind( outline, 'mousedown', function( event ) {
 					var newEvent = Object.assign( {}, event );
-					beforeSelection = editor.selection.getBookmark();
 
 					if ( hover ) {
 						dragTarget = hoverTarget;
@@ -428,7 +427,7 @@
 								$draggedNode[0].removeAttribute( 'contenteditable' );
 							}
 						}
-						editor.selection.moveToBookmark(beforeSelection);
+
 						editor.nodeChanged();
 					} );
 				}