Standardization of styles across admin panel interfaces

[boonebgorges]

The various PF admin panels, especially the non-Reader panels related to Tools and Settings, use similar but not identical styles. We should standardize these. As part of this process, we should also review where PF forces certain styles that would better be inherited from WP, for greater integration into the Dashboard experience, not to mention lower maintenance overhead.

[boonebgorges]

I've reworked all the Tools and Settings screens to use similar markup and styling. A few highlights:

• Standardized styling, which inherits as much as possible from WP Core's admin standards
• Use the form-table layout for settings wherever possible, for better readability
• Reorganize settings on complicated pages like Site Options, with subheadings for better readability
• Improved naming and descriptive paragraphs for greater clarity
• Improved semantic markup and accessibility through the standardization of headings and the grouping of related settings into fieldsets

Before and after screenshots of the Site Options panel will help show some of these improvements:

Before

After

There's still room for improvement, but these changes represent a pretty big step up for the purposes of this release.