Confusing text on unsaved content warning

[btubbs]

When you try to save a page without first saving the plugins, you get a Javascript alert message with this text:

"Not all plugins are saved. Are you sure you want to save the page?
All unsaved plugin content will tried to save."

This message has broken grammar, which confuses users into thinking that clicking OK is safe, rather than dangerous. Better text would be this:

"Not all plugins are saved. Are you sure you want to save the page? You may lose your changes. To prevent that, cancel this message and save the individual plugin(s) first."

[beniwohli]

@ojii can you look at this? Not sure how this interacts with transifex

[ojii]

with English we have to pull manually via git and then push to transifex. for some reason TX doesn't allow editing the "source" language.

[beniwohli]

I cherry-picked @yakky's translation. We have to do a transifex run sometime before 2.3.1 anyway