Add an option to hide "private" targets and/or target w/o description

[JHag6694]

Hello

To my knowledge, there are 3 kinds of targets in an Ant file

1. "Private targets": targets with name starting with a hyphen ("-").
2. "Main targets": when using ant -p, only these targets are displayed.
3. "Other targets"

See in https://ant.apache.org/manual/targets.html,

"Targets beginning with a hyphen such as -restart are valid, and can be used to name targets that should not be called directly from the command line."

See in https://ant.apache.org/manual/running.html

"Targets that include a description attribute are listed as "Main targets", those without a description are listed as "Other targets", then the "Default" target is listed ("Other targets" are only displayed if there are no main targets, or if Ant is invoked in -verbose or -debug mode)."

So it would be good

• To have 2 options to hide/show "Private targets" or "Others targets"
• To display with distinct colors the 3 kinds of targets

See example in Eclipse Ant view (where there is no distinction between "Private targets" and "Other targets")