kcms: port InlineMessages to frameless style where appropriate

Part of teams/vdg/issues#47

A lot of KCMs have InlineMessage objects in their header areas and could make use of this styling. Let's port them to use it.

I tried to minimize the diff size, but in some cases a bit of re-plumbing was needed to get everything to line up right.

Requires frameworks/kcmutils!220 (closed) or else the KCMs using SimpleKCM get excessive header padding.

Example of how it looks now in the Fonts KCM (other KCMs show the same style):

Before	After

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