Lots of small improvements

• Added a search function
• Added a presentation mode.
• Adds Q and CTRL-Q hotkeys to copy the component the mouse
  pointer is hovering over.
• Now there is resetRandom method available in the test code to
  reset the random number generator used by the random function.
• The remote server is now disabled by default.
  It must be enabled in the settings.
• When a new component has been placed with CRTL click,
  you can place another one.
• Fixes the ignored default value in demuxer HDL export.