Handle AR exceptions when a new Catalog item is created

A call to create_request might lead to AR exceptions in the model that
need to be rescued and passed on to the controller.

https://bugzilla.redhat.com/show_bug.cgi?id=1095457
Converted image-based form buttons to Patternfly btn class buttons
converted tabs to spaces, aligned hash rockets, adjusted formatting
Deleted unused image-based form buttons
Increase time windows attempting to fix the sporadic testing failure
Added missing no-hover class to OS, VMM and Device info pages.

https://bugzilla.redhat.com/show_bug.cgi?id=1133855
aligned hash rockets, adjusted formatting

https://bugzilla.redhat.com/show_bug.cgi?id=1133855
fixed yellow background issue in css; adding missing column header in column styles preview

https://bugzilla.redhat.com/show_bug.cgi?id=1134745
aligned hash rockets, adjusted formatting

https://bugzilla.redhat.com/show_bug.cgi?id=1134745
updated report running tree icon to match glyphicon

https://bugzilla.redhat.com/show_bug.cgi?id=1134749
Handled miq_request case separately to differentiate 2 kinds of URLs

Handled the miq_request case separately to differentiate 2 kinds of URLs
(a) /miq_request?typ=vm   --- Used for Services/Requests tab
(b) /miq_request?typ=host --- Used for Infrastructure/Requests tab

This resolved the issue of user getting redirected to the incorrect
Requests page when the main tab - Services or Infrastructure is clicked.

https://bugzilla.redhat.com/show_bug.cgi?id=1136363
Fixed typo in virtualization_type

https://bugzilla.redhat.com/show_bug.cgi?id=1133780

This is one part of a multi part fix for this issue
Merge pull request #494 from mkanoor/amzn_vtype_typo

Fixed typo in virtualization_type
Remove link to ask

Left display text, but changed link to go to to “talk”
Merge pull request #496 from mfeifer/readme

Remove link to ask
Merge pull request #486 from epwinchell/Host_info_styling_issue

Host info styling issue
Merge pull request #487 from epwinchell/report_styling_fix

Report styling fix
Merge pull request #484 from epwinchell/Patternfly_formbuttons_12

Patternfly formbuttons 12
Let the user know an encryption key is required

https://bugzilla.redhat.com/show_bug.cgi?id=1136573
Merge pull request #492 from epwinchell/reporting_running_icon

updated report running tree icon to match glyphicon