Feature roadmap/NAND full should not crash XO

Feature subcategory		Is part of::Category:Linux and OS
Requesters		{{#arraymap:Uruguay|,|x|Requested by::x}}
Requirements		* Must allow access to the journal and other parts of the file system to delete items, even when the NAND is full Must allow the user to choose which items get deleted to clear space.
Specification		#7590 Must allow deleting files when the NAND is full.
Owners		{{#arraymap:Gregorio|,|x|Contact person::User:x}}
Priority		not indicated
Helps deployability?		not indicated
Target for 9.1?		not indicated