Update certain icons to more accurately resemble card symbols
It looks like the official card symbols are a bit different than their Keyrune icons for a number of symbols. For the next major release these should all be corrected and redrawn if necessary.

- [x] **4th, 5th, and 6th Editions:** the bars are taller (thicker) in the original icons
- [x] **7th Edition:** the stem of the 7 has a larger angle
- [x] **8th Edition:** the "8" appears to be a different font
- [x] **Ice Age:** the card symbol is inverted from the Keyrune icon, I think this should be two versions for now as even though the thinner lines might be accurate to the card symbol it might not translate to the web
- [x] **Mirage:** the tree trunk is about the same but the leaves in Keyrune are tighter than those in the original symbol
- [x] **Visions:** the "V" is a different font and there is no bar extending from the black flag to the circle on the bottom
- [x] **Portal Second Age:** all lines are convex in the offical symbol, not straight, and the hole in the middle is smaller [redraw]
- [x] **Shadowmoor:** the left wing is wider in the official symbol

Thanks to Ron <[greendisenchantproject.jimdo.com](https://greendisenchantproject.jimdo.com/)> for noticing these and compiling the original list.