New feature, Navigation hover show full name

Some database/table/column name just so long that can't show it completely,
relative to adjust the Navigation's width, hover to show it fully is better.

![original](https://f.cloud.github.com/assets/5505691/2136096/93fe7228-930a-11e3-8bdd-3cf7495ae403.png)
![pmahomme](https://f.cloud.github.com/assets/5505691/2136097/94016564-930a-11e3-86af-bcb81aa87a3c.png)

Btw, some end-sign notes "end" is uppercase, some is lowercase, i unify them to lowercase

Signed-off-by: Edward Cheng &lt;c4150221@gmail.com>