Fix #7927 : Add a warning message if trying to print a composition
as an image fails (Qt's QImage sanity check for memory overflow)
Moved previous commit from core/qgscomposition to apps/qgscomposer
as QGIS server uses qgscomposition.
Merge pull request #670 from tqhien/master

Fix #7927 : Add a warning message if trying to print a composition
Merge pull request #671 from qgis-jp/make_pull_req_from_ja

update GUI translation ja
fix #8131
fix #8099: useful error message on table_info
[spatialite] Implement rewind()
[spatialite] Fix compile error
update Translation GUI ja