Minor suggestions for zoom, dropdown and search

[guest]

The dropdown box that offers various zoom options is too narrow to show the whole text of some of the options. For instance, I have "Actual Siz" and "Fit in Wind". There is a lot of space on the tool bar. Why make the zoom select too narrow? Or add a "+" and "-" to step the zoom up or down.

Using a magnifying glass as a symbol for Search is wierd, for me anyway. I am used to magnifying glasses for, well, magnifying. The only application I recall seeing the MG for search is Reader. Hmm, is there an icon that is commonly used for finding/searching?

[pr]

See #54

[ktk]

Moved to beta 4, some parts are a duplicate of #54

[eros2]

(In [129]) find/findagain bitmaps replaced (closes #71), added 'zoom in/out' toolbar button