Display longer legend names

Legend values were truncated via PR #914, which closed #899.

These can now be relaxed as testing indicates that legend values are no
longer being rendered behind other items.

Closes #1306

src/util/globals.js

@@ -50,7 +50,7 @@ export const rbsColorDomain = genericDomain;
 export const dateColorDomain = genericDomain;
 export const legendRectSize = 15;
 export const legendSpacing = 4;
-export const legendMaxLength = 18;
+export const legendMaxLength = 24;
 export const nonTipNodeRadius = 0;
 export const tipRadius = 4;
 export const tipRadiusOnLegendMatch = 7;