Directories added to dirChan no longer trigger checkDir

[Michael-Gallo]

In certain conditions, checkDir would cause a directory to be sent to app.nav.dirChan which would in turn call checkDir, creating an infinite loop. The call to checkDir when a value is sent to app.nav.dirChan is likely unnecessary and removing it should fix the loop
See Issue #1543

[joelim-work]

Thanks, I would also consider removing the following two lines of code since they were also introduced in the same commit, and is also a potential source for infinite loops:

lf/app.go

Lines 419 to 420 in cf99626

	app.nav.checkReg(r)

[Michael-Gallo]

Makes sense, done

[gokcehan]

@joelim-work @Michael-Gallo Is this waiting for my approval? Sorry, if that's the case. I think it looks fine and we can merge it.