Update fallbacks for display.name and friends

[larsyencken]

Problem

There has been confusion as to what the display.name field should be used for and what title_public should be used for.

This led to substantial discussion and a few options being floated here.

Change to fallbacks

The option we picked means the following changes:

About this data

• From: [display.name > title] - [description_short]
• To: [title_public > grapher_config.title > display.name > title] - [title_variant] - [attribution_short] - [description_short]

Table tab

• From: [display.name > title]
• To: [title_public > display.name > title] - [title_variant] - [attribution_short]

Heading of a 1-indicator chart

• From: [grapher_config.title > display.name > title] - [grapher_config.subtitle > description_short]
• To: [grapher_config.title > title_public > display.name > title] - [grapher_config.subtitle > description_short]

NOTE: Here we reverse the hierarchy of grapher_config.title and title_public. This can be confusing, but this way we don't need to define both title_public and grapher_config.title for indicators with long names. And it also lets us have a data page with a title different from the chart title.

Legend in a chart

• From: [display.name > title]
• To: [display.name > title_public > title]

No change

Admin page:

• No change: [title]

Data page title

• No change: [title_public > grapher_config.title > display.name > title] - [attribution_short] - [title_variant]

Theoretically in future

Search result

• From: [title_public > grapher_config.title > display.name > title] - [title_variant]
• To: [title_public > grapher_config.title > display.name > title] - [title_variant] - [attribution_short] - [description_short]

[larsyencken]

@danyx23 Could you give this a quick eyes over to confirm this is alternative 3 as you understood it? If there's anything that needs editing, please just edit inline above.