[Table] Add a JMenuBar to the Table displayer with a menu to save the table as a CSV

[hadim]

A table displayed is not really useful if it cannot be exported. It's possible to do it programmatically but that would be nice to be able to add this feature to the SwingTableDisplayViewer.

I know there is some refactoring of Table undergoing at the moment so I'll wait for it before proposing a PR (I can also help with the refactoring if needed). Here are the tasks for the refactoring:

• Migrate the net.imagej.table package from imagej-common to a new scijava-table component. See Create scijava-table component scijava/scijava-common#314.
• Release a new version of scijava-table.
• Migrate imagej/imagej-plugins-io-table to scijava/scijava-plugins-io-table.
• Release a new version of scijava-plugins-io-table.
• Migrate the net.imagej.ui.swing.viewer.table package from imagej-ui-swing to scijava-ui-swing component.
• Release a new version of scijava-ui-swing.

[imagejan]

Current progress: today I released version 0.1.0 of scijava-table. Before this can replace net.imagej.table.*, we need to adjust imagej-legacy and imagej-omero and release new version of both, as the API (the package name) changed. See also scijava/scijava-table#2 and #78.

[imagejan]

See also discussion in scijava/scijava-ui-swing#37.

[ctrueden]

Closing in favor of scijava/scijava-ui-swing#37.