Character limit is not made evident to user

[waldyrious]

As of the latest release, there appears to be a 64-character size limit to entries in the input box, but once that limit is reached, no warning is shown to the user -- the input box simply stops accepting characters. This may be even if text is pasted into the input field, since it can be cropped without notice.

There should be some visual indication that the size limit has been reached. Something simple like a red outline around the input field, with a tooltip appearing to explain what the error, would be fine.

Even better would be an interactive indicator -- for example a character count at the right that turns orange when getting close to the limit, turns red at the limit, and maybe even blinks when the user tries to input characters past the limit.

[waldyrious]

By the way, right now it is possible to work-around this limit as described in #19.