Better cross platform support

Edit-MyScript will pause if edit is running in background (conext
returning less than a second after launching editor)
Test-MyModules which loads at stratup now has specific platform lists

src/modules.json

@@ -1,8 +1,14 @@
 {
-  "Modules": [
-    "Microsoft.PowerShell.UnixCompleters",
+  "Always": [
     "PowerShellCookbook",
     "oh-my-posh",
-    "posh-git"
+    "posh-git",
+    "z"
+  ],
+  "Desktop": [
+  ],
+  "Unix": [
+    "Microsoft.PowerShell.UnixCompleters"
   ]
+  
 }