Dropdown menu for forum images in directory

When adding a new rank image, you upload the image inside the "/images/ranks" directory, and then go in the ACP and chose the newly uploaded image from the dropdown menu. I propose the same system for the forum images feature, as currently we have to manually type the path to the image.

So... Create a /forum_images/ directory inside the /images/ dir, where the ranks, smilies folders are, and figure out how to list files inside that new directory

Advantage:
It makes it easier to add forum images and its a cleaner way to manage these images, same as we manage ranks, smilies, etc.

It also saves some small database space as instead of typing the same directory path over and over again, for each image, the php code is just set to list files in a specified directory...

/images/forum_icons/image.png
/images/forum_icons/image.png
/images/forum_icons/image.png
/images/forum_icons/image.png
/images/forum_icons/image.png

......