All classes will be shipped with !important.
This need to be done as when you write a custom class on your project, you won't be able to replace one of the attributes using Lazit utilities.
For example:
Having this class on my project:
.big {
margin: 10px;
font-size: 30px;
}
And trying to do something like:
to change the margin top of this specific element won't result in a different margin top, as _mt won't replace the amrgin-top of .big