Adds two new capitalization styles for labels and text symbols:
- Small Caps: Renders lowercase characters as small caps
- All Small Caps: Renders all characters as small caps (regardless
of their original case)
Requires Qt 6.3+, or Qt 5.15 using KDE's fork and the cmake
HAS_KDE_QT5_SMALL_CAPS_FIX switch defined during build.
This is a hack which has been in place in layouts/composer for a long
time in order to provide more consistent and reliable text rendering
at small font sizes or when "zoomed out". Without this hack the font
rendering and metric based calculations for these small font sizes
can be unstable, leading to font sizes "jumping" around as a layout
is zoomed into or out of.
