Localisation updates from https://translatewiki.net.

Change-Id: I5afe8a3215d8e071c32856549300d259e479b384
Localisation updates from https://translatewiki.net.

Change-Id: Iecb1db75ac23b76a8187227edfc3e7841cada2ad
Localisation updates from https://translatewiki.net.

Change-Id: Ic12a4fb167a9184ad48c1466ac16e275bd973728
Localisation updates from https://translatewiki.net.

Change-Id: If7c1cdf35ea5afa9accb4c0833939af402bb0eef
Add support for apostrophes in titles

The href attribute is urlencoded, so (for example) apostrophes appear as
%27. This causes the API request to contain the percent-encoded name
instead of the the actual file name; thus, the API request fails and the
overlay will not work.

To fix this, decode the title from the URL first to get a valid title
representation for the API.

Change-Id: I00f96c9c870b878ca25792a878f3ceb7e9aefacc
Use plain-text title attribute

Since the image caption can contain rich content (in the simplest case, a
page link to the image or another article), using the element's HTML
content will show HTML tags within the title text.

Instead, use the combined text content (with whitespace trimmed) as this
will show the content as plain text.

Change-Id: I5bcc7adcca5a9a2ff953a42f4174245e8701abaf
Merge "Add support for apostrophes in titles"