613: Added possibility to compare overridden template with the original one

[alexstpp]

Description (*)

Added posibility to compare current template with original one.

Fixed Issues (if relevant)

1. Fixes Add possibility to navigate from an overridden template inside of a custom theme directly to the original one #613

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with integration/functional tests (if applicable)
• All automated tests passed successfully (all builds are green)

[bohdan-harniuk]

Hello, @alexstpp!

Thank you for your work here! It is really great!

I've found two exceptions:

1. comparison is available for module templates (unexpected behaviour) + it is not supported by the code and it resulting in a critical error
2. another critical error shown while comparing theme template with the original one

Action shown for the module template:

Critical exception while calling the action for the module template:

Critical exception while calling the action for the theme template:

ℹ️ I've fixed showing the action for the module template:

ℹ️ Results after code refactoring:

Please, take a look at my changes.

Regards,

[bohdan-harniuk]

Hello, @alexstpp!

Thank you for your work!

Regards,