When the title and the 'current value' text are both long, typically
with a huge font selected, they now avoid overlapping by moving the
value label down.
We should not require the user to put it in a layout with spacing, that
will just create inconsistencies.
Instead make sure that the button itself is tall enough for easy aiming
on small screens.
This reflects that it is a full screen page and has no 'back' button.
We also remove lots of small hacks that have seens been made standard in
reusable components.
This makes the widgets more re-usable by following the general
design of Qt components with porperties like implicitWidth being
implemented as expected.
The 'text' and 'windowText' were both used like they were the same
thing, which they currently are but don't have to be.
Now migrate the various cases where to we use 'text' to 'windowText'.
This choice is made because the Label object uses windowText by default.
In future we might want to make the 'text' one have a slightly different
color. Its still used in Qt components like the popup menu.
This improves the TextButton to be more re-usable and have an arrow to
make it clear it actually is a button.
Added a sub-text as well.
This made it really easy to make an About page with some subpages or
external links.
Also increased the top-header from 40 to 50 'pixels'.
tomFlowee