**BUG**
Concise problem statement:
Steps to reproduce bug:
1.
2.
3.
Results:
Expected results:
Url:<you url here>(click the Share my works button to get it)
Browser:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.154 Safari/537.36
errMsg:#browser: chrome;
#type: undefined;
#string: SyntaxError: Failed to execute 'querySelectorAll' on 'Element': '#' is not a valid selector.;
#stack: Error: Failed to execute 'querySelectorAll' on 'Element': '#' is not a valid selector.
at Object.History.$o0101 (https://easyeda.com/lib/min/editorSCH.min.js:7:11391)
at Object.History.$o0100 (https://easyeda.com/lib/min/editorSCH.min.js:7:17715)
at Object.History.$o099 (https://easyeda.com/lib/min/editorSCH.min.js:4:29677)
at Object.History.go (https://easyeda.com/lib/min/editorSCH.min.js:6:4644)
at callCommand.registerHook.undo (https://easyeda.com/lib/min/editorSCH.min.js:5:30676)
at callCommand (https://easyeda.com/lib/min/editorSCH.min.js:1:116)
at HTMLDocument.handleKeydown (https://easyeda.com/lib/min/editorSCH.min.js:2:14516)
