Less version

Move to LESS it will be easier to maintain code.
It outputs to:
```css
.CodeMirror .CodeMirror-searching {
  background-color: rgba(240, 128, 71, 0.9);
  border: 1px dashed white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
  color: #ffffff !important;
}
.CodeMirror .CodeMirror-searching .searching-current-match {
  background-color: #af2018;
}
```
Is that not correct?