Compiling the two files including the emoji data now doesn't take
significantly longer anymore than before. Size of the .text section
also drops by more than 1Mb, while runtime or memory cost remains
unchanged.
There's more that could be done here, but not having to wait minutes
for those files to build is worth it on its own already.
Since _ls is now deprecated this is removed in favour of L1, I've also taken the oportunity to replace QStringLiteral and QLatin1String with their shortened form while we're at it.
There are also a few instances where the string literal type has been switch, the general rule being to use the one that matches the function type or value being compared to avoid conversions.
