Allow selective disabling of inline links

I apologize if this issue is already covered, I was not able to find any discussions about it.

In general, I like the inline admin links (and so do my clients), but on occasion they are either unhelpful or intrusive. I wanted to allow users to selectively disable them in these cases.

The attached patch was written to scratch this particular itch. The feature could be taken further; but this first version of it met all of my needs, and has been working well for me. I'm posting this here in case anyone else is interested.

The attached patch attempts to allow this in a flexible manner. The inline links can be disabled based on type ("block", "node", "views"). This setting can be found under Themes -> Administration Theme, and changing it effects all instances of that type.

For blocks, the inline links can further be enabled/disabled on a per-block basis. (This is only implemented for blocks, so far). That setting is located on the Configure page for any given block.

The default is to show the inline links (which preserves the behavior of the module prior to applying the patch).

Note: this patch is against Admin 1.0, specifically -beta3. (To be honest, I haven't even tried the 2.0 version yet).