Some more GUI improvements

[twagner9]

Description

This update tackles a few different UX improvements:

Refinement Results

Previously the only heat map that could be saved as a PNG was the highly detailed one that showed every point plotted, as opposed to the binned heat map, which can sometimes be useful to save as well.

Display Program

This included several UX updates:

1. Return to having attempts at opening cisTEM_display with arguments open in an existing display instance instead of opening a separate display by establishing the first instance as a server and searching for the server socket in /tmp. I coded this up from scratch but it was present in the Tigris display, which also did this.
2. Images displayed in cisTEM_display can now be saved directly as a PNG, rather than having to take a screen-cap. Along with this, there is a second saving option that will save the image(s) on a white background with a color gradient legend that displays the approximate pixel values of the grayscale coloration.
3. There is now a brief user manual under the Help menu that will explain some of the cisTEM_display controls that aren't really listed anywhere, such as use of arrow keys for scrolling images/tabs, and the effects of the mouse buttons when in certain modes. Many people around the lab were unaware of some of the nicer features with this so it seems likely any other users probably were not aware either.

Fixes # (issue)

I have rebased my feature branch to be current with the master branch using to minimize conflicts and headaches

• yes
• no

Which compilers were tested

• g++
• icpc
• clang
• other (please specify)

These changes are isolated to the

• gui
• core library
• gpu core library
• program it modifies

How has the functionality been tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• Tested manually from GUI
• Tested manually from CLI
• Passed console tests
• Passed samples functional testing
• other (please specify)

Checklist:

• I have not changed anything that did not need to be changed
• I have performed a self-review of my own code
• I have commented my code, (w.r.t. why), particularly in hard-to-understand areas
• I have made corresponding changes to the documentation {Ok to pass for now}
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[bHimes]

Afaik this looks good.

[twagner9]

@bHimes
I added just one final change requested by @timothygrant80 to allow users to pass a switch (-n) that will let users open a new instance of cisTEM_display with MRC file arguments. It just uses the built-in wxCmdLineParser to check for the switch and now loads the filenames into a member array to stick to better DRY principles. Functionality otherwise the same.

[timothygrant80]

Looks good.