Add Multi-select support to query history view

This is not quite ideal due to
microsoft/vscode#99767

Allow multiselection in the query-history view. For commands
that shouldn't accept multiple options, show a user message
to that effect.

For remove query, allow multiple removals at once.

For compare query, allow selecting of exactly two queries.
Otherwise, throw an error. Also, verify that the selected queries
are compatible to compare.

Author: aeisenberg

.vscode/settings.json

@@ -34,5 +34,7 @@
     "resolvePluginsRelativeTo": "./extensions/ql-vscode"
   },
   "editor.formatOnSave": false,
-  "prettier.singleQuote": true
+  "prettier.singleQuote": true,
+  "typescript.preferences.quoteStyle": "single",
+  "javascript.preferences.quoteStyle": "single"
 }

extensions/ql-vscode/package.json

@@ -302,14 +302,6 @@
         "command": "codeQLQueryHistory.viewSarif",
         "title": "View SARIF"
       },
-      {
-        "command": "codeQLQueryResults.nextPathStep",
-        "title": "CodeQL: Show Next Step on Path"
-      },
-      {
-        "command": "codeQLQueryResults.previousPathStep",
-        "title": "CodeQL: Show Previous Step on Path"
-      },
       {
         "command": "codeQLQueryHistory.setLabel",
         "title": "Set Label"
@@ -318,6 +310,14 @@
         "command": "codeQLQueryHistory.compareWith",
         "title": "Compare with..."
       },
+      {
+        "command": "codeQLQueryResults.nextPathStep",
+        "title": "CodeQL: Show Next Step on Path"
+      },
+      {
+        "command": "codeQLQueryResults.previousPathStep",
+        "title": "CodeQL: Show Previous Step on Path"
+      },
       {
         "command": "codeQL.restartQueryServer",
         "title": "CodeQL: Restart Query Server"