Material Skin and Dark Mode

[lnx00]

I've updated the UI using the Material Skin provided by IgnaceMaes and fixed a bug where the installation path was set to NULL when you click abort on the folder browse dialog.
You are also able to select a dark mode in the new options tab.

[megalon]

Wow, this looks great, thanks for making this!

I think that the dark theme could use a little color tweaking.
The categories are really hard to read, and I think that the dependencies highlighting is a bit too dark, but it's not that bad.

[megalon]

As you can see it's pretty hard to read the categories

[lnx00]

Yes, but I'm still trying to figure out how to change the color of the GroupNames. Apparently it's not that easy to change them. I gonna have to change them using an override or something like that :/

[megalon]

It looks like you can't change the color of the text for a ListViewGroup
https://stackoverflow.com/questions/3073389/win32-list-view-group-header-text-color

Instead of using ListViewGroups, we could have a single group and simply have each category label as a special ListViewItem with it's own color scheme.

I've noticed that there is no minimum window size when using the material skin, so it's possible to make the window disappear down to nearly a single pixel.
Edit: This is easy enough to fix by setting minimum size within FormMain.cs

[megalon]

Going to go ahead and merge this, then add in the minimum size after, and make a few tweaks to the theme as well. Thanks!

[megalon]

I ended up reverting this merge because your branch has the dependencies code that does not work properly, and I was unable to easily remove it.
I'm going to try to remove it again from your fork, but for now I'd rather not have it in the master branch.

[lnx00]

Special colors for each category is a good idea! I'm going to start to implement it today. Did you think about custom ForeColors or BackColors?