Improve handling of WHMCS configurable options for AutoVM product server module

[an0nz]

Bugfixes / Improvements to WHMCS product module

• Template Configurable Options set to hidden will not be displayed in Change OS
• UI support for WHMCS's standard value|display name format in configurable options
• Template Configurable Options using the value|display name format correctly filter allowed templates
• Template Configurable Options using the value|display name format, correctly show display name in Change OS selects and the current template in machine details
• Increased max-width of hostname to prevent line breaks unless names are long

[an0nz]

@persgeek any chance this can get merged in, these are critical fixes for our environment due to how templates are named and displayed in WHMCS with various options being hidden

[an0nz]

@persgeek do you need anything more from me to merge these fixes?