Add custom block region just below a section on a course section page

[Manoj Solanki]

Add a custom block region that appears on a single section page after all activities. Add the required setting and also add to frontpage in the hidden section to allow adding the block for configuring to appear on all course pages.

[Manoj Solanki]

Fix #933.

→ <<cset 7571bf93c39a>>

[Manoj Solanki]

Fix #933. Testing revealed error when moving blocks into the region due to length of block name. Changed name to fix this.

→ <<cset 1c9624f8f108>>

[Manoj Solanki]

Extra requirement. Add this block to all mod pages for future use.

[Manoj Solanki]

Fix #933.

→ <<cset 40309cc806c3>>

[Manoj Solanki]

After review, specifically only show this on the following mod pages (currently it shows on edit and create mod pages too):

• section
• book
• page

[Manoj Solanki]

Fix #933.

→ <<cset 9e617dee5792>>