File Formats: Update GIF export dialogue screenshot and options
This patch attempts to update the wording for the GIF export dialogue section.
- A new screenshot of the dialogue is added.
- The new option "Number of repeats" is added
- "GIF Comment" is changed to "Save Comment" to match the dialogue wording
@Wormnest Hi! I plan on updating the entire file format section, but I wanted to start with a small part to make sure I'm doing this correctly. Please let me know what I need to change or fix. Thanks!