Usability changes for MythTV backend status page

[sphery <mtdean@…>]

The attached patches modify the backend status page in various ways to try to make the Disk Usage section of the page more useful--especially in light of the large number of filesystems often used with current MythTV.

mythtv-backend_status-move_total_disk_space_to_top.patch simply moves the "Total Disk Space" section to the top of the list. Then, the per-filesystem details follow. See screenshot at  http://misc.thirdcontact.com/MythTV/status_with_total_at_top.png

With the totals at the top, it seems better to break the disk usage information into 2 sections, a "Summary" and a "Details" section. mythtv-backend_status-split_total_and_detailed_storage_info.patch does this (apply on top of mythtv-backend_status-move_total_disk_space_to_top.patch ). See screenshot at  http://misc.thirdcontact.com/MythTV/status_with_total_at_top_and_separate_summary_and_details_sections.png

Also, users who rely on auto-expire often find the disk usage information useless. Therefore, mythtv-backend_status-add_livetv_deleted_and_expirable_to_total_space-separate_summary_and_details.patch (apply on top of mythtv-backend_status-split_total_and_detailed_storage_info.patch ) adds the total space used by LiveTV, Deleted, and expirable recordings as well as the total space available after auto-expire. See  http://misc.thirdcontact.com/MythTV/status_with_total_at_top_and_separate_summary_and_details_sections_and_autoexpire_totals.png for screenshot.

If you don't want to move the "Total Disk Space" section to the top, mythtv-backend_status-add_livetv_deleted_and_expirable_to_total_space.patch (apply by itself, but only if not moving total section), adds the auto-expire details, but does not move any information. See  http://misc.thirdcontact.com/MythTV/status_with_autoexpire_totals_for_LiveTV_Deleted_and_expirable_recordings.png for screenshot.

Note that the auto-expire information is not shown if there are no LiveTV, Deleted, or expirable recordings.

[sphery <mtdean@…>]

Moves "Total Disk Space" to top

[sphery <mtdean@…>]

Splits "Disk Usage" into "Summary" and "Details" sections. Apply on top of (after) mythtv-6589-backend_status-move_total_disk_space_to_top.patch

[sphery <mtdean@…>]

Adds auto-expire space usage to Total Disk Space. Apply on top of (after) mythtv-6589-backend_status-split_total_and_detailed_storage_info.patch

[sphery <mtdean@…>]

Adds auto-expire usage information to "Total Disk Space". Use alone and only if not moving "Total Disk Space" to the top. (Not for use with other patches.)

[sphery <mtdean@…>]

By the way, the auto-expire usage information is only shown for the Total Disk Space section because determining usage at the filesystem level would require both using storage groups to look up/find every single recording /and/ mapping the hostname/directory combination to a filesystem. Doing so would be very slow. If auto-expire information at the filesystem level is desired, we'll need to add some information to the database (i.e. have the autoexpire thread "index" the current locations of everything each run or something).

[stuartm]

(In [20988]) Re-organise the disk space information in the status screen so that the most important stat, total diskspace, is at the top. Also breakdown usage according to recording type (LiveTV/Deleted/Expirable). Patches from Michael Dean (Sphery). Closes #6589