Remove single unicode character from autotag query (#2363)

* Remove single unicode character from autotag query
* Compile regex once where possible
* Fix CPU profiling
* Only match unicode characters if in path

main.go

@@ -35,10 +35,11 @@ func main() {
 	manager.Initialize()
 	api.Start(uiBox, loginUIBox)
 
-	// stop any profiling at exit
-	defer pprof.StopCPUProfile()
 	blockForever()
 
+	// stop any profiling at exit
+	pprof.StopCPUProfile()
+
 	manager.GetInstance().Shutdown(0)
 }