and install facility for text scaling similar to freetype.c.

xspf-specs seems to agree that it's valid this way. (title tag MAY
appear once in item)

playlist/items.c: Add a left over that might prevent art/meta from being fetched. Reported by ileoo.

- always round Scale to 1 because we only support that value

don't connect QSpingBox valuechanged to edit-stuff, seems that signal is
emited when value is updated from software also (textEdited for text is
emited only when user changes stuff).

show up when filename is send)

that solves 'blank' popups problem