Search box help not visible if histrory contains long search expressions

[bilbo]

The box to enter search query in the search dialog accomodates to contain longest search expression in available history.

This have very negative effects, when the search history contains some very long expression, as can be seen on the attached screenshot. (box wider than window and you need to scroll to see the help text)

I think the search box should have fixed size, or at least have some limit.

[bilbo]

Screenshot of bad search dialog

[bastiK]

In [3684/josm]:

fixed #5644 - Search box help not visible if histrory contains long search expressions