You haven't explained your post well, but after thinking about it, I think I know what you mean. You want for example, when you type a message similar to an emotion, the panel comes up, narrowing down your results. A bit like modern search tools.
Good idea, but it is very impractical. It would be hard to know how your emoticon shortcuts are formatted. For some it is a word, others start with '(' or ':', thus making it nearly impossible to achieve, unless you have your emotions all organised. Another point is you may find it annoying when type a sentence, and the panel suddenly pops up when you don't want it to
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