Fix importTitle and autoOpenOnImport in the tm-import-tiddler message (#7243)

* Add initial tm-import-tiddler test

* Add failing test for tm-import-tiddlers importTitle #7234

* Add failing test for tm-import-tiddlers autoOpenOnImport #7234

* Use event.paramObject instead of event to access tm-import-tiddlers options. Fixes #7234.

* Added a clarifying comment

* Allow mixing tm-import-tiddler params in both event and event.paramObject

* Added import test using tv-auto-open-on-import variable

* Removed stray punctuation

editions/test/tiddlers/tests/data/messages/tm-import-tiddler/default.tid

@@ -0,0 +1,34 @@
+title: Message/tm-import-tiddlers/default
+description: tm-import-tiddlers message by default should import to $:/Import and open the tiddler
+type: text/vnd.tiddlywiki-multiple
+tags: [[$:/tags/wiki-test-spec]]
+
+title: Output
+
+text: <$text text={{$:/Import}}/>
+plugin-type: <$text text={{$:/Import!!plugin-type}}/>
+~$:/StoryList: <$text text={{$:/StoryList!!list}}/>
++
+title: Actions
+
+<$navigator story="$:/StoryList">
+<$action-sendmessage
+  $message="tm-import-tiddlers"
+  $param='[{"title": "Elephants"}, {"title": "Eagles"}]'/>
+</$navigator>
+
++
+title: ExpectedResult
+
+<p>text: {
+    "tiddlers": {
+        "Elephants": {
+            "title": "Elephants"
+        },
+        "Eagles": {
+            "title": "Eagles"
+        }
+    }
+}
+plugin-type: import
+$:/StoryList: $:/Import</p>