Show the activity information in the view page and add/edit submission
page.
- Removed the line change to disable activity header. This should help
- When any additional files are attached to the assignment by the
teacher/admin they should be displayed in the view and add/edit
submission page (in the default settings)
- Added more padding to the "Add submission" button.
- Changed the string 'Activity' to 'Activity instructions'.
Test data providers are executed before `setUpBeforeClass`, so any
library constants used by the providers must already be present.
Reverts part of the change in 691c5b83.
Course formats may want to preserve the existing section information,
but either change the wrapper (.section .course-section-header), or
prepend and append additional content to it.
Prior to this change, the only way to do this was by copying the entire
content of the template.
This change moves the content of the .course-section-header to a
separate template.
This means that a course format can replace the .section
.course-section-header wrapper whilst retaining its content by
overriding the content/section template and including the
content/section/content template. For example:
```
<li id="section-{{num}}"{{!
}} class="section course-section main clearfix{{!
}}{{#onlysummary}} section-summary{{/onlysummary}}{{!
}}{{#ishidden}} hidden{{/ishidden}}{{!
}}{{#iscurrent}} current{{/iscurrent}}{{!
}}{{#isstealth}} orphaned{{/isstealth}}{{!
}}"
data-sectionid="{{num}}"
data-sectionreturnid="{{sectionreturnid}}"
data-for="section"
data-id="{{id}}"
data-number="{{num}}"{{!
}}>
<!--
Add a custom div to the existing wrapper, without replacing the
entire content of the section/content.
-->
<div class="my-custom-content">
<!--
The upstream content is here:
-->
<div class="course-section-header d-flex"
data-for="section_title"
data-id="{{id}}"
data-number="{{num}}"
>
{{$ core_courseformat/local/content/cm/section/content }}
{{> core_courseformat/local/content/cm/section/content }}
{{/ core_courseformat/local/content/cm/section/content }}
</div>
</div>
</li>
```
It also means that a course format can append additional information to
this wrapper, for example:
```
{{< core_courseformat/local/content/section }}
{{$ core_courseformat/local/content/cm/section/content }}
<div class="some-custom-class">
<!--
Some custom content appended _before_ the course section
content but within the wrapper
-->
</div>
{{> core_courseformat/local/content/cm/section/content }}
<div class="some-custom-class">
<!--
Some custom content appended _after_ the course section
content but within the wrapper
-->
</div>
{{/ core_courseformat/local/content/cm/section/content }}
{{/ core_courseformat/local/content/section }}
```
Course formats may want to preserve the existing activity information,
but either change the wrapper (.activity-item), or prepend and append
additional content to it.
Prior to this change, the only way to do this was by copying the entire
content of the template.
This change moves the content of the activity-item to a separate
template.
This means that a course format can replace the activity-item wrapper
whilst retaining its content by overriding the cm template and including
the cm/activity template. For example:
```
<div class="my-custom-activity-item {{!
}}{{#modstealth}}hiddenactivity{{/modstealth}}{{!
}}{{#modhiddenfromstudents}}hiddenactivity{{/modhiddenfromstudents}}{{!
}}{{#modinline}}activityinline{{/modinline}}" data-activityname="{{activityname}}">
{{#moveicon}} {{{moveicon}}} {{/moveicon}}
{{$ core_courseformat/local/content/cm/activity }}
{{> core_courseformat/local/content/cm/activity }}
{{/ core_courseformat/local/content/cm/activity }}
</div>
```
It also means that a course format can append additional information to
this wrapper, for example:
```
{{< core_courseformat/local/content/cm }}
{{$ core_courseformat/local/content/cm/activity }}
{{> core_courseformat/local/content/cm/activity }}
{{#cmmeta}}
<div class="ct-activity-meta-container">
{{{cmmeta}}}
</div>
{{/cmmeta}}
{{/ core_courseformat/local/content/cm/activity }}
{{/ core_courseformat/local/content/cm }}
```
This interface allows a templatable to provide a template name via the
'get_template_name(): string' function and have it automatically
rendered via a standard 'render()' call.
