dev build 200311231900

In the module listings dialog, clicking on the
"enabled" flag for a module requires two clicks to
modify its value if the module was not previously
selected. We should only be requiring a single
click even if the module is not selected.

Secondly, if a module consists of multiple
submodules and one of them has "enabled=false"
while others are equal to true, the "equals" value
of the parent module is equal to "null" which is
bad. We should display "mixed" or something as the
value.

Thirdly, When a module is selected, its "enabled"
flag cannot be read. This is because we select a
module using a blue background color and the
"enabled" flag uses black font. The result is a
black foreground with a dark blue background which
is unreadable.