Allow columns on manage pages to be hidden

[ryan]

Much in the fashion of the metabox hiding, allow columns on the manage pages to be hidden. If you don't use Categories, hide them.

[ryan]

Show hide for posts page. Inline edit not yet hidden column aware.

[ryan]

With inline edit support

[ryan]

(In [8858]) Column hiding for manage posts. see #7725

[ryan]

Committed for wider testing. Need to consolidate some of those CSS classes and do this for pages, links, comments, etc.

[ryan]

(In [8860]) Column hiding for pages. see #7725

[ryan]

(In [8888]) Column hiding for links. see #7725

[ryan]

(In [8894]) Column hiding for media library. see #7725

[ryan]

(In [8923]) Consolidate column header code. Add column hiding to taxonomy pages (incomplete). see #7725

[ryan]

(In [8930]) Column hiding for tags. see #7725

[ryan]

(In [8932]) Column hiding for categories. see #7725

[ryan]

(In [8933]) Column hiding for link categories. see #7725

[ryan]

(In [8936]) Column hiding for users. see #7725

[Viper007Bond]

Column hiding for comments, has CSS issues (see reply)

[Viper007Bond]

There's my shot at column hiding for edit-comments.php. I moved the JS for the "Advanced Settings" box to it's own file to avoid duplicating that JS all over the place.

There is one issue with my patch though: due to the generic CSS classes that are now added to the columns, the "Comment" column is a bit screwy. The links are the wrong color and I think there's an issue with the width of the column. Someone with better CSS skills than I will need to debug it.

[Viper007Bond]

Use edit-comments.js instead of new comments file + include settings-box.js file

[Viper007Bond]

Link colors fixed, but I can't figure out the column width issues (hide "Submitted" column to see)

[ryan]

(In [8988]) Column hiding for comments. Settings box JS consolidation. Props Viper007Bond. see #7725