Improved the feature #25

[Vest]

Hello @Nilhcem,

I have reviewed my feature and performed a couple of changes. I hope this will work fine on your machine:

• Windows 8.1/Ubuntu 15.04/Mac 10.10.4 support the "tray" feature (unfortunately, I had to implement a private key that I do not like, but I couldn't resolve platform issues in a neat way. None of solution I have found in Internet are cross-platform);
• I have re-designed the "minimize" functionality. Now, when a window is closed - it is closed. But if you minimize, it will be "iconified".

Thank you in advance,
Vest

[Vest]

A small comment regarding the pull request: it seems that the TrayIcon feature is quite tricky in different platforms. I hope at least I solved it.
Could you please take a look at my code, and probably test on your current machine just in case?

[Nilhcem]

Many thanks, I will check all this when I have some time

[Vest]

Ok, thanks.

[Nilhcem]

I prefer this version (app getting iconified when minimized).
Merged on master but still disabled by default.

I tested it and it works well on Windows + GNOME (well, there's no minimize button), however it does not seem to work on a Mac OSX (JRE 1.8.0_60-b27), when pressing the minimize button it goes to the dock and disappears right away

[Vest]

Oh, I really sorry again.
When my Mac is repaired, I will check my coding. Let us keep this feature disabled.

[Nilhcem]

Sorry too, I don't have time to investigate also. If this is too complicated or involves writing too much code, maybe we can just disable the feature for mac users (we need to make sure it works well on Linux Desktop Environments first)

[Vest]

It doesn't require much code, or at least my last version. This kind of low-level stuff requires some magic and luck.
E.g. I had to always experiment and verify changes in every platform.
But thanks again. I will probably do as you said.