Update lang of img pagetools

Replace part of localized searchtext by placeholder

added stripped bit to language file

this has been done by a script and might not be 100% accurate

Update localizations

translation update

localize jQuery UI date picker FS#2912

translation update

translation update

removed unused lang string (authmodfailed)

translation update

Esperanto language update

fixed language file placeholders FS#2682

link directly to subscription management in mails

This was updated in the english translation a while ago, but was still
missing in some translations

changed semicolon to colon in link to welcome page to make it less confusing

Esperanto language update

Use hardcoded plugin loading error message as $lang isn't initialized

When loading plugins, $lang might not be initialized yet, so use a
hardcoded error message instead, especially as this error sho

Use hardcoded plugin loading error message as $lang isn't initialized

When loading plugins, $lang might not be initialized yet, so use a
hardcoded error message instead, especially as this error should only be
displayed for the admin (and then fixed). This also removes the
previously localized message, it might be re-added as part of the new
extension manager.

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fixed validation errors in the installer

changed the link in the installer to point to wiki:welcome