Issue with layer view

[brettz9]

Reposting @enlove's screenshots and comments from issue #305:

Describe the bug

To Reproduce Steps to reproduce the behavior:

1. Open layer view on the right
2. Drag a menu onto the canvas
3. Layer view will not display properly

Expected behavior

Layer view to display properly

SVG-Edit environment (IMPORTANT)

• File for SVG-Edit: svg-editor.html?lang=zh-CN
• Version: [e.g. 4.1.0]
• Protocol: [e.g., http, https, file]

Desktop (please complete the following information):

• OS: win7 x64
• Browser: chrome
• Version 69.0.3497.100

Screenshots

Sorry, what do you mean "draw out it"? drag out