Plonetheme.blueberry

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- Plone 5.1 compatibility:

- No longer us `u` function of zope.schema._compat - was removed.
- Load SkipLinks viewlet only for plone4, this no longer exists in plone5.
- Load TinyMCE 3 customization (JSONSearch) only for plone4.
- Load js, which defines PORTAL_URL first and support data-base-url attr on body tag.

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- Add compatibility with latest Plone 4.3.x. [mbaechtold]

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- Enable the injection of custom HTML after the main navigation. [mbaechtold]

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- Move simplelayout specific print styles. [Kevin Bieri]

- Style inuput type url like all other input fields.
[mathias.leimgruber]

- Fix compatibility with ftw.theming 2.0.0 [Nachtalb]

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- Truncate placeholder overflow using ellipsis.
[Kevin Bieri]

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- Fix single status in editbar.
[Kevin Bieri]

- Restyle sitemap !this may break some custom sitemap-stylings!
[raphael-s]