Fix for the broken whiteboard toolbar

More Recording fixups

This was broken by my earlier change to fallback the pdf filename for
really old recordings.

Rearrange the code so that the pdf logic is only used in the case when
the presentation is a pdf.

 - double check if the user has left the meeting before opening an avatar icon when closing the video view window

Fix panning

 - generate an unsigned applet so other can sign using their own cert

 - generate an unsigned jar and a signed jar. Others can get their own certificate and sign their own jar file.

Only one Chat hotkey needed changing to incorporate focus.

Pres hotkey focus fix

Fixed focus and permission bugs for the remaining Presentation hot keys (Next and Previous, Slide selection, Fit to Width/Page) all at once.

Focus moves to Upload Presentation button when the relevant hotkey is used. Also fixed a small permission error in the same function.

whiteboard tools now stay selected after hitting undo

missed a file while removing viewers

Even more client fixes

lock icon now only visible when locked

Remove viewers and listeners

Focus moves to the 'start' of the BigBlueButton window when user leaves ...

Recording fixups