v0.8 - Dialog enters the game

• Video: https://youtu.be/NfTyRrsdB1I
• Moved the theme editor tool icon to the left
• Theme Editor:
  • Added a color background as an option
  • Reduced the vertical size needed to show all options
  • Style your choice buttons! (Color, background, etc...)
  • Better default support for unchanged styles
• Timeline Editor:
  • Moved the event buttons to a new column
  • When creating a Question two Choice events and a End Branch event will be added automatically
  • Added a warning for Choice events on the root level of indentation
  • Disabled unfinished events
  • The Change Timeline event tells you your current timeline (this is for going back to the start)
  • New Close Dialog event. This event closes the dialog whenever it is called.
  • When renaming a dialog the popup's text field is already selected and focused.
• In game dialog:
  • You can now select the current timeline from the inspector without manually copying the timeline id.
  • Change timeline event is now working
  • Audio event can play sounds
  • Character join (left, center and right) working
  • Focus in and out of portraits when speaking
  • Character leave events working
  • Basic question/answers support
  • Better scene resizing and position
  • Button styles