[rekonq] Two patchs

[Cédric Bellegarde]

FontSizeDpi.diff:
- Compute font size from logical dpi: fonts have normal size now
- Add minimal font size option

ToolBarStyle.diff:
- Repect kde toolbar configuration (icons, text, text+icons)
- With text beside icons, only back button got text (we don't want a cluttered 
interface)
- With text under icons, urlbar is too fat bug can't find a way to fix it.

Cédric
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