[pt] Added ENTITY colloquialism_msg to messages.ent

[marcoagpinto]

Heya, @susanaboatto and @p-goulart ,

I have added this message because of the dozens of pt-PT rules such as:

        <rule>
            <pattern>
                <token inflected='yes'>o</token>
                <token>nem-nem</token>
            </pattern>
            <message>Esta é uma expressão oral. Reveja.</message>
            <url>https://pt.wiktionary.org/wiki/a_nem-nem</url>
            <short>Coloquialismo</short>
            <example correction=''><marker>a nem-nem</marker></example>
        </rule>

Also, would it be a good idea for me to remove all <short> messages in pt-PT, since they are terrible? A person is revising a document, and it shows a suggestion with just one or two words which is completely unclear and not useful at all… I prefer longer explaining messages.

<short>Coloquialismo</short>

[susanaboatto]

The short messages don't necessarily replace the longer message. They can coexist.