IDEA提交代码，一直卡着不动，显示：Commit Changes Dialog local changes refresh
修改方法为：
- go to settings - version control - background
- set changelists to cache initially to minimal value (10)
- check setting refresh changes every
- set huge value for minutes (240 for example)
- save settings
- reload Idea
参考：http://stackoverflow.com/questions/28751247/how-to-control-intellij-idea-14-indexing-and-vcs-refresh-behavior