update editor screenshot in the documentation
update editor screenshot in the documentation

JakubLukas/LumixEngine,gamedevforks/LumixEngine,dreamsxin/LuxEngine,zhouxh1023/LumixEngine,galek/LumixEngine,galek/LumixEngine,JakubLukas/LumixEngine,dreamsxin/LuxEngine,zhouxh1023/LumixEngine,gamedevforks/LumixEngine,JakubLukas/LumixEngine