Fixes #12937 - All parameters can be hidden

The js to hide parameters was moved to lookup_key.js which isn't
included in application.js so only templates that include it
specifically can hide values.

Fixes #12793 - reverted field filtration to enabled fields only

Fixes #12794 - Defined logic when properties should be sent to server

If hostgroup is not set - always send the parameters.
On hostgroup change - remove inherited parameters from the request, so the values from the hostgroup will take place.
On save - send the values according to the state of the "inherit" button.

Fixes #7230, #12021 - Upgrade to Rails 4.1.5

This commits upgrades Rails to Rails 4.1.5. See a description of the
changes included here, and go to the pull request in GitHub to see more
detailed explanations:

• Update gems to a Rails 4 compatible version, including dependencies...

Fixes #12748 - "Add Smart Variable" button does not change color on click

Fixes #12852 - override checkbox always enables default value when use_puppet_default is false

Fixes #12828 - Hidden value checkbox enabled after override button is checked

Fixes #12659 - Fixed "inherit" behavior

Non-inherited attributes are now sent in the form data.

Fixes #6007 - Allowing to hide smart class parameters

i18n - add Catalan Language