MISC: Various small fixes (#574)

* ns.ls filter can include leading slash in filename
* scp from terminal accepts multiple filenames
* terminal displays root / instead of ~ as base
* cd with no args returns to root

src/Terminal/getTabCompletionPossibilities.ts

@@ -163,7 +163,7 @@ export async function getTabCompletionPossibilities(terminalText: string, baseDi
   // Just some booleans so the mismatch between command length and arg number are not as confusing.
   const onCommand = commandLength === 1;
   const onFirstCommandArg = commandLength === 2;
-  const onSecondCommandArg = commandLength === 3;
+  // const onSecondCommandArg = commandLength === 3; // unused
 
   // These are always added.
   addGlobalAliases();
@@ -239,11 +239,12 @@ export async function getTabCompletionPossibilities(terminalText: string, baseDi
       return possibilities;
 
     case "scp":
-      if (onFirstCommandArg) {
-        addScripts();
-        addTextFiles();
-        addLiterature();
-      } else if (onSecondCommandArg) addServerNames();
+      if (!onFirstCommandArg) {
+        addServerNames();
+      }
+      addScripts();
+      addTextFiles();
+      addLiterature();
       return possibilities;
 
     case "rm":