Update comment.js

These changes will let to use the following directives inside your less files that will affect your css selectors:

all directives starts with //~

1. //~.btn+=.button
this means that .button will be displayed EXACTLY as .btn.
.btn class will remain the same.

2. //~.table|.table-striped+=#ticketTable
Now #ticketTable class will be equal to using .table and .table-striped styles together.

3. //~.new-button=.btn
btn class will be replaced with new-button

Please note that these "replacements" will affect all occurrences of source class.

for example if you have the following classes:

.mylink {} 
.mylink:hover, secondlink:hover {}

and you are using the following:
//~.mylink+=.myspeciallink

in target css you will get the following selectors:

.mylink, .myspeciallink {} 
.mylink:hover, ..myspeciallink:hover, secondlink:hover {}

This "preprocessor" is really useful for example if you want to apply bootstrap styles to existing project and want to minimize the changes amount in source files. Instead you are building your proprietary bootstrap version with this "preprocessor"