Re-wrote fancy blur effect CSS

I used this loading bar in my application but ran into style issues when trying to move the loading bar below my navigation bar. 

I decided to imitate your original blur effect using a CSS triangle and a drop shadow. This removes the need to have the 'peg' sticking out at the top of the loading bar.

The colour of the triangle should match the colour of the loading bar.

```
border-right: 40px solid #29d;
```