Improve GUI of its Control Panel Applet

[Zero3K]

The following improvements should be done to it:

• Change the font used by it so it matches with the font used by rest of the properties of the "ERAM for Windows x86/x64" device that is listed in Device Manager.

• Make the Disk size option have a radio button that lets the user switch between KB/MB/GB (Kilobytes/Megabytes/Gigabytes) to make it easier to specify how big the RAM Disk should be.

• Have the currently selected options be filled in (they are blank at the moment even though they are set properly).

• Split the Option key in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Eram\Parameters into multiple Registry Keys so that way the Option key can be removed.

By the way, the source of the Control Panel Applet is in the eramui folder.

[Zero3K]

The first item in the list was easy for me to fix and the third item turned out to be fixed by compiling it in VS 2017 (it must've been a bug with the version of VS he used to compile it originally).

[Zero3K]

The 2nd item in the list was done thanks to Mysoft (who is in the #winapi channel of the Freenode IRC network).

[Zero3K]

I lost the changes he did so someone else has to do it.