DM-7116: change the title of drawing layer dialog based on the title of the active image

[cwang2016]

Make the tile on the drawing layer dialog to be the same as the image title from either image or catalog search.

[ejoliet]

Sorry but i don't see the title changing. Do i have to build firefly and deploy fresh war?

[cwang2016]

Yes, you have to do 'gradle :firefly:deploy :firefly:war".

[cwang2016]

if you switch from DM-6980.

[ejoliet]

I did a purge, then a fresh build and deploy on tomcat where i have clean the webapps,etc.
Still don't see the title changing. Is it only me? Can @tgoldina or @robyww confirm?

[ejoliet]

Oh, i know. Yes, i can defintively see the title update. What i was confused is that i was looking at the title while i change the image active, and the title doesn't change unless i close and reopen the layer window.
I guess this is a different issue that can be brought later.

For now, it works as described in the ticket.
Review done.

[robyww]

Even though this pull request has been merge it should be changed right away.

[robyww]

This is not the correct way to get the primary plot. The plots array should never be access directly. Beyond that 0 is not always the primary plot.
the primePlot function should always be called here.

The code should be

const plot= primePlot(visRoot());
title= plot ? plot.title : null;