SyncPlayer 1.6.10 - offset field fix, tidier status line

Added

• Settings option to hide the live Movie / Reaction / delta readout. Messages still
  appear while it is hidden.

Removed

• The Align button: the Offset field sets an alignment directly, and typing 0 clears it.
• The shortcut hint row at the bottom of the window; the same hints are in Help.

Fixed

• Typing an offset and pressing Set did nothing. The field is synced from the live offset
  many times a second, and it only paused that while the field itself had focus - clicking
  the button moves focus to the button, so the typed value was replaced by the current one
  just before it was read.
• A captured frame is normalised to 8-bit RGB before the crop window opens, because a
  16-bit PNG (what a 10-bit source produces) can render as an empty canvas in some Tk
  builds.