Allow create Service Dialog from Template on Ansible/Templates screen, depending on navigation steps

[hstastna]

Issue: #6375

Relatively recently the Configuration toolbar button was added to Ansible Tower Templates screen, with possibility to create Service Dialog from a selected Template in the list. However, this button appeared also on the screen with the list of Templates related to selected node in accordion, for example related to Ansible Tower Automation Manager. While being in such a screen, creating Service Dialog did not work, nothing happened in the UI, and error occurred.

The problem is exactly here. It's easy to achieve the situation when both params[:id] and params[:miq_grid_checks] are set, so we are trying to find the selected item using the id which is in params[:id] because params[:id] is present, but we are not successful, obviously. We don't have proper id in this situation. The proper id we want to find the selected item is always in params[:miq_grid_checks] if params[:miq_grid_checks] is present. If this was not true, then the fix wouldn't work.

I've made change the way that it checks params[:miq_grid_checks] first. And if it is not present, we can find the selected item as originally - by id set in params[:id]. This works well in all the kinds of lists or in details pages of Templates under Automation > Ansible Tower > Explorer. Looks like params[:miq_grid_checks] is never present if we are in a details page or in a list view with the All Ansible Tower Templates node selected in accordion.

Related PR: #5968

---

Before: (nothing happens in the UI)

After:

[hstastna]

@miq-bot add_label bug, automation/ansible tower, ivanchuk/no

[hstastna]

@miq-bot add_reviewer @skateman

[miq-bot]

Checked commit hstastna@694438e with ruby 2.5.5, rubocop 0.69.0, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 0 offenses detected
Everything looks fine. 🏆

[skateman]