GUI-379: Filters for image picker in launch instance and launch config wizards

Implements https://eucalyptus.atlassian.net/browse/GUI-379

Notes:
- "Linux" was removed as a filter choice for platform per AWS docs (i.e. only "windows" is a valid platform choice if set on AWS for images)
- Infinite scroll doesn't appear to be required in the image picker since the DOM is far lighter there than on the images landing page.
- The "tags" filter was removed to avoid conflicts with the tag editor in the wizard