Keyboard shortcuts not obvious enough

[ToksT]

The page http://danbooru.donmai.us/static/keyboard_shortcuts lists the available keyboard shortcuts, but it's unlikely for someone to find that page without specifically looking for it. And it doesn't seem good for users to not know about them, or they may use them accidentally and not know what they did.

Suggestion: Add tooltips for when the user hovers over the elements that correspond to the shortcuts.
For example, when hovering over the "Edit" button, the text "Shortcut is E" would appear. When hovering over the arrows in the paginator the text "Shortcut is →" would appear.
The add note button already has a tooltip, but it says "Shortcut is CTRL+N", when it is actually just N.

[r888888888]

fixed