Fix observatory widget

[mwcraig]

This fixes #281 b y disabling continuous_update for most entry widgets.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.31%. Comparing base (4dabd8d) to head (f57ac2f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #284      +/-   ##
==========================================
+ Coverage   71.29%   71.31%   +0.02%     
==========================================
  Files          25       25              
  Lines        3100     3103       +3     
==========================================
+ Hits         2210     2213       +3     
  Misses        890      890              

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[JuanCab]

The changes seem to be mostly documentation and for the auto_widget_viewer.ipynb notebook just changing the name of the PhotometyOptions to PhotometryOptionalSettings (the new name for those settings). Seems completely reasonable stuff.

[mwcraig]

This is really the only functional bit:

    for widget in ui.di_widgets.values():
        if hasattr(widget, "continuous_update"):
            widget.continuous_update = False

It prevents the AutoUi widget from trying to force the string representation of values into the widget as you are trying to type. That was really annoying and made it essentially impossible to edit a value like latitude that had correct units but an incorrect value.