Add "system tray" direction (easy issue)

[make-your-soft-better]

I have placed the "system tray" applet on the right side of my lxpanel, between the "windows list" and the "keyboard layout".
When a new application opens with an icon in the system tray, it appears on the right, near the "keyboard layout", and all previous icons move to the left.
This greatly spoils the view - it is impossible to get used to where the icons are, because they are constantly moving.
On Windows, new icons appear on the left, and it doesn't look so broken.

Example on LXDE:

Looking cool.

Open Discord.

Looking broken.
Network-manager applet and "volume icon" moved to live in another country.
System icon, system icon, DISCORD, system icon...

At this moment, the "system tray" applet cannot be configured.
I suggest adding the ability to customize which side the icons will appear - on the left or on the right.
Thus, LXDE will become much more convenient and beautiful thanks to such a small detail.
I don't think this is a difficult task, and that it will greatly increase the overall weight of the LXDE.
But it will make it very pleasant for everyone who likes to set up their own system.

If you want to add the ability to move icons in the system tray, then you should also be able to change the direction of new icons.

I would like to take this opportunity to say thank you for LXDE! This is the best minimalistic DE!