Add Attribute Selectors about css-protips HOT 4 CLOSED

@Electrofenster that's a good one, Lars. Thanks for suggesting it.

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Added with 43e82e5.

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thanks 👍

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@AllThingsSmitty maybe you can add these for input's too:

input[type="submit"] {
    border: 1px solid #EFEFEF;
}

input[type="text"] {
    border: 1px solid #CCCCCC;
}

input[type="password"] {
    border: 1px solid #FF0000;
}

from css-protips.