TinyMCE: prevent the inline toolbar from appearing on partially selected wpview nodes. This can happen when HTML is initially loaded in the editor and wpview is the first node, or sometimes on repeatedly pasting the same wpview.

Props gitlost.
Fixes #38849.

git-svn-id: https://develop.svn.wordpress.org/trunk@39904 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/js/tinymce/plugins/wpview/plugin.js

@@ -190,7 +190,7 @@
 				] );
 
 				editor.on( 'wptoolbar', function( event ) {
-					if ( isView( event.element ) ) {
+					if ( ! event.collapsed && isView( event.element ) ) {
 						event.toolbar = toolbar;
 					}
 				} );