Update blades.css

Added a different value for the --dark-secondarytext in the label styling; the background of some labels on this sheet is the same color as the initial value of --dark-secondarytext so it's making the text invisible. It'll be a much more significant undertaking to modify the sheet to fully take advantage of dark mode, but this should at least allow things to function as they should without full toggle support.

Blades in the Dark/blades.css

@@ -37,6 +37,7 @@
   padding: 0;
   display: flex;
   width: auto;
+  --dark-secondarytext: #333; /* setting this variable here takes care of the text color getting overridden in dark mode, which causes some of the label text (that's also on a background the same color as the initial dark-secondarytext value) to go invisible! */
   color: #333;
   font: inherit;
 }