Hello.

I will describe my feature-request behind first, so that You'll understand why I am requesting it. I believe there will be many other developers that will find this feature very helpful.

Most of the time when developing an application and/or it's part I have to have opened many files (controllers, models, views, HTML, CSS and JS files) which could be from 3 to more then 10 files. Then at certain point I need to pause working on the current part and open another X files for another application component, which means I have opened let's say 10 files from my previous and unfinished work and another 10 files from mu current work.

As I am not actually developing on the previous work I could just close all the unnecessary files, but this is not desired as I may return to it in a few hours or days and I would have to reopen all the files again (which may take a few minutes in a robust application).

Therefore it would be very nice if I could just "stash" those files from previous unfinished work into some stack or special editor tab so that there is more space for new tabs (new files I am currently working with). This could be done either as a tab - create a new "stack" tab + select file + add to the that tab; or as a special history window with drag and drop option - I should be able just to drag a tab (opened file) from editor to that history window while a new stack will be created immediately on drop so I could drag&drop other tabs on the created stack (or outside to create another stack). Now I think a special history window would be more user friendly and won't break current editor layout (and should be also more easily implemented).

As a side feature the stacked files could be removed from memory immediately (because most of the time with 30 files opened NetBeans eats around 1,3 GB of RAM).

Then after double-click on the stack all stashed files could be opened at once - so I could easily (with a blink) get back to my previous work.

Do You think such a feature would be a nice and applicable improvement?