DeClassified 0.98.1

Highly recommend reading "Welcome to DeClassified 0.98.txt" if you plan on using this for your own needs.

This is a smaller release that fixes two issues and adds one feature.

• Fixed the slider button still relying on volume.bmp, instead of relying on slider.png (thanks @SameytheHedgehog for catching and submitting a PR!)
• Fixed the pressed state of the Video buttons being misaligned (thanks @SameytheHedgehog for catching this!)
• Added support for the ISO Frequency mode for the Equalizer, where it'll switch to the appropriate image.