Make Search Bar multiline-friendly

[NikolayXHD]

• add line break on Shift + Enter or Ctrl+Enter
• handle Tab key
• extend search bar height to fit all rows, until certain maximum is reached
• collapse multiline to single-line
  • when
  • changes applied by Enter
  • search bar loses focus
  • preserve text editor state when collapsing
  • restore collapsed to multiline if text editing keyboard button is pressed while focus at search bar
  • show full multiline query in tooltip of collapsed to single-line search bar
• make auto-collapse optional, add button to collapse manually