Without this Outlook and Windows Mail don't honour the font set at the top level. Note that this change predates all the screenshots I uploaded to the wiki on 2017-02-02, I'd just forgotten to commit them.
Ten thousand changes ought to be enough for any normal mapping activity.
Automatic edits and imports are controlled by scripts anyway so it doesn't
make a difference to them as they just have to adapt the limit.
The reason for my suggestion is that large changesets are becoming
increasingly difficult to handle due to frequent timeouts when trying
to load and process them.
The changeset size limit is returned by the API in the "capabilities" request
so client software that honours that information will automatically pick up
the new limit.
Closes#1259
Solved the problem of <p> tags being given different padding or color by different clients, without having to copy-paste a string of CSS into every <p> tag in the templates.
The greeting includes the recipient's user name (as for the message notification mail), which should increase the recipient's trust that the message isn't spam. Greetings were reused from each language's respective locale flie.
Several notifications are about a message having been sent from one user to another via OSM. I've moved the code for the HTML table that holds the actual user message, with the avatar and the body text, to its own partial template, so that it can be reused. I've updated a second notifier message to the new template, diary_comment_notification.
Since all HTML mails will presumably share the same overall layout, and the markup is fairly dense, it makes sense to use Rails layouts to share the structure across mail templates. This commit moves the core structure of the HTML mail to a layout. It will need to be further refined so that notifications that involve a text message sent by another user can share the avatar-and-message-text structure.
Rather than including HTML markup in the locale file (which also has the inconvenience of requiring both a plain-text and an HTML duplicate of the same string), move the markup to the template. Also added a helper to reduce clutter in the template slightly.
Make the file paths to image assets more compact. I investigated using `image_path` but could only get it to return the path for a public URL, which is different and also includes the asset pipeline digest.
