Class definition of pq-align-left is missing from css styles

In v3.5.1, the following CSS styles are missing:

```
.pq-align-left{
    text-align:left;
}
.pq-grid .pq-align-left *{
    text-align:left;
}
```

As a result, **halign: "left"** in colModel will not take effect.