Add Media Wizard i18n

There are more unclear variables in Add Media Wizard - Add Media message group:

What messages the variables stand in the following messages for?

• mwe-error-not-loggedin-file $1?
• mwe-upload-once-done $1? $2?
• mwe-ie-inline-upload $1? $2?
• mwe-no-import-by-url
• mwe-not-logged-in-uploads $1? $2?, see also above in the first message of Hamilton Abreu
• mwe-warning-upload-to-commons $2?, see also above in the first message of Hamilton Abreu

And which message follows message mwe-i-would-like-to?

these message issues should be resolved with the new [$1 link text] syntax. I will dive into fixing them soon.