Merge branch 't/13756'

CHANGES.md

@@ -5,6 +5,7 @@ CKEditor 4 Changelog
 
 Other Changes:
 
+* [#13756](http://dev.ckeditor.com/ticket/13756): Fixed: Context menus are cut-off in Microsoft Edge.
 * [#12707](http://dev.ckeditor.com/ticket/12707): Fixed: The order of table elements does not meet the HTML specification.
 
 ## CKEditor 4.5.7

plugins/floatpanel/plugin.js

@@ -270,8 +270,8 @@ CKEDITOR.plugins.add( 'floatpanel', {
 						target.removeStyle( 'width' );
 
 						if ( block.autoSize ) {
-							var panelDoc = block.element.getDocument();
-							var width = ( CKEDITOR.env.webkit ? block.element : panelDoc.getBody() ).$.scrollWidth;
+							var panelDoc = block.element.getDocument(),
+								width = ( ( CKEDITOR.env.webkit || CKEDITOR.env.edge ) ? block.element : panelDoc.getBody() ).$.scrollWidth;
 
 							// Account for extra height needed due to IE quirks box model bug:
 							// http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug

tests/plugins/floatpanel/manual/rendering.html

@@ -0,0 +1,12 @@
+
+<textarea cols="80" id="editor1" name="editor1" rows="10">
+	<ul>
+		<li>foo</li>
+		<li>bar</li>
+		<li>baz</li>
+	</ul>
+</textarea>
+
+<script>
+	CKEDITOR.replace( 'editor1' );
+</script>

tests/plugins/floatpanel/manual/rendering.md

@@ -0,0 +1,14 @@
+@bender-tags: tc, 4.5.8, 13756
+@bender-ui: collapsed
+@bender-ckeditor-plugins: wysiwygarea,toolbar,elementspath,list,liststyle,basicstyles,contextmenu
+
+1. Open context menu inside any of list items (e.g. with a right mouse click).
+
+### Expected
+
+The panel layout is correct.
+
+### Unexpected
+
+Panel is cropped.
+