fix can't get current hash

[Akegarasu]

Description

When using WEBUI_LAUNCH_LIVE_OUTPUT, the default arg "live" for function "run" is set to True. This prevents getting stdout and stderr from return value, thereby making it impossible to get the current_hash. As a result, offline startup is not possible.

Screenshots/videos:

Checklist:

• [x] I have read contributing wiki page
• [x] I have performed a self-review of my own code
• [x] My code follows the style guidelines
• [x] My code passes tests