Two hintkeys problems + a feature suggestion

[redblade7]

Hi,

At the request of @madand, I'm reporting two issues here regarding the hintkeys:

1. The first character in the hintkeys option is ignored (e.g. "0123456789" will ignore "0", though "10" will be fine). This also applies to "a" when hintkeys is set to "abcdefghijklmnopqrstuvwxyz" (it starts at "b")
2. When using letters, the hintkeys option is case sensitive, and there is strange behavior (letters are out of order all over the place) when you type letters in a different case.

Also a feature suggestion:

1. The equivalent option in Vimperator is hintchars, and there are multiple options to choose from:

After fixing the bugs above, it would be nice to have presets for hintkeys just like Vimperator's hintchars.