Sh-2129 Viewer caps implementation for resource cost selected. Also cleanup of old code related to earlier accounting work.

Included are upload floater tweaks, build panel tweaks,
and removing the mesh enabled checkbox in region tools.

Fix for sh-2044, sh-2039 and sh-2166 (Avatar weights were sometimes not correctly applied upon import.

SH-1868 FIXED Rearranged the accounting info to leave enough room for the upload permissions warning.
Removed hiding the accounting info when warning is displayed.

SH-1941 FIXED Mesh upload menu enabled when avatar is in the region that does not allow building but supports mesh upload.

The mesh category string selected by user within the model data and sent to the server during calculating the upload fee and upload requests.

The accounting info and the upload permissions warning in the bottom left corner of the floater are temporarily made mutually exclusive.

- Remove checkbox for per-region mesh disablement and corresponding code

- When the “Load from file” radio is selected, the labels uner it are disabled.
- Added horizontal lines to LoD tab like in the physics tab.
- Physics tab: LoD dropdown moved to the left, against the “Use Level of Detail” label.
- Modifiers tab: fixed dimensions to show a z value.