Avoids an ambiguity in the style database update logic which forced
us to always attempt to reimport these ambiguous symbols, resulting
in sqlite errors due to violated name constraints
Ship the style database with a "Default" text format, so that users
get a nicer appearance when they first set labels on layers.
Fixes#16911, fixes#18804, fixes#32798
style
Credit to https://github.com/sjmgarnier/viridis
Note -- unless you bypass the version check on line 3271 of qgsstyle.cpp
you won't automatically see these appear in your existing style files
until the 3.20 final release!