[BUG] Inconsistant helper and button text in model creation

[bdehrhart]

Describe the bug
The helper text and button text (see screenshots below) refer to "collection" when in the model creation dialogue window.

To Reproduce
Steps to reproduce the behavior:

1. Go to Inventory
2. Go to a Collection
3. Go to a Group
4. Click "ADD A NEW MODEL" button
5. In the "Add new model type & miniatures" window that pops up, note the button on the lower-right says "ADD COLLECTION"
6. When the "ADD COLLECTION" button is pushed with a blank (empty) model name, the helper text "The name of a collection cannot be empty!" appears

Expected behavior
In the "Add new model type & miniatures" dialogue window, the "add" button should read "ADD MODEL" and the helper text should read "The name of a model cannot be empty!"

Screenshots

[mhollink]

Thanks for creating the issue and the accompanied pull request.

I have merged the code change and will update the deployment tomorrow.

[bdehrhart]

Great, thanks!

Love the app, very cool