[WIP][Frost Mage] Guide & Tooltip Text Updates

[Sharrq]

Now that the guide for Frost Mage is closer to complete, I am going through the various sections of the guide and adjusting the wording of some of the sections to further explain the various spell interactions and fix some grammatical errors.

Also fixing a few tooltips that I missed outside of the guide.

Other changes:

• Added a chart to the Winter's Chill section to show the number of hits per spell in Winter's Chill. This may not be that useful in improving, but might be good info to be able to see, and also helps fill in some of the empty space due to the length of the description.