Allow importing history with same name as original history

This only applies if the history is an external one, for current
user's histories, we still disallow the same name.

By default, the pre-filled value is still "Copy of Original Name"
Can change it so by default, the name is just the original name?

client/src/components/History/Modals/CopyModal.vue

@@ -62,7 +62,7 @@ export default {
         };
     },
     computed: {
-        ...mapState(useUserStore, ["isAnonymous"]),
+        ...mapState(useUserStore, ["currentUser", "isAnonymous"]),
         title() {
             return `Copying History: ${this.history.name}`;
         },
@@ -72,8 +72,11 @@ export default {
         saveVariant() {
             return this.loading ? "info" : this.formValid ? "primary" : "secondary";
         },
+        userOwnsHistory() {
+            return this.currentUser.id == this.history.user_id;
+        },
         newNameValid() {
-            if (this.name == this.history.name) {
+            if (this.userOwnsHistory && this.name == this.history.name) {
                 return null;
             }
             return this.name.length > 0;