TextViewer: font size

[hius07]

The DictQuickLookup and TextViewer windows are alike, let TextViewer use the same settings dict_font_size and dict_justify.

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This change is 

[poire-z]

Just a comment, not sure we need to do something.

The DictQuickLookup and TextViewer windows are alike, let TextViewer use the same settings

Been a bit annoyed since this PR, and to me they are not alike :)
I have my dict font size set to 17 - which is small, but fine with my non-"Large window" dict result window: as it is small and narrow, a small font size is fine, and I usually don't really "read" the whole dict result, I just quick scan it and may really read one or two sentences.
Getting the same tiny font size in eg. Book description, a large and tall window, that I may want to read fully, makes it have long lines of tiny text, and harder to read.

(I also have other TextViewer to see logs and various stuff in my own patch which got a bigger font size that the small one I set - I realize reading this PR that text_face = Font:getFace("infont", 12) won't work anymore, and I just need to use text_font_size = 12 instead.)

[Frenzie]

Ah, this PR is to blame for that. I'm inclined to agree. ^_^

[hius07]

The separate setting would be good I believe.