better-manage-global-menu (#4)

Reviewed-on: #4

sharedModule.nim

@@ -1,4 +1,5 @@
 from std/osproc import startProcess, ProcessOption, waitForExit, close
+from std/os import fileExists
 
 proc runCommand*(command: string, args: openArray[string]): int =
   ## This will run a command with the given args and return its exit code upon completion
@@ -7,4 +8,4 @@ proc runCommand*(command: string, args: openArray[string]): int =
   process.close()
 
 proc isGlobalMenuEnabled*(): bool =
-  return runCommand("/usr/bin/pacman", ["-Qq", "vala-panel-appmenu-registrar"]) == 0
+  return fileExists("/usr/lib/vala-panel/appmenu-registrar")