Fix remaining lint problems in tickcontext.js
Fix remaining lint problems in tickcontext.js

Huji/vexflow,Silverwolf90/vexflow,Huji/vexflow,Tails/vexflow,Huji/vexflow,Silverwolf90/vexflow,aaronmars/vexflow,aaronmars/vexflow,Tails/vexflow,Tails/vexflow,aaronmars/vexflow,Silverwolf90/vexflow