simplify
Add a grayscale blending (name in .dgml: GrayscaleBlending).

Blendings can now also be applied to the top most layer.

REVIEW: 109982
Based on a patch by Konrad Enzensberger, thanks!
CCMAIL: e.konrad@mpegcode.com
Fix compilation after API change in a411529

At least there should be a deprecation period for the removed methods.
Imho the removed drawLine method in a411529 is a convenience method
that is nice to have even. After all the library API should be easy to
explore and the implementation of the method is easy enough not to
introduce a maintenance problem.
CCMAIL: bbeschow@cs.tu-berlin.de
Don't crash with texture-less themes (e.g. plain map).

CCMAIL: bbeschow@cs.tu-berlin.de
Please review whether this is the correct place for the check.
compile under Harmattan
base review requests on master branch by default
remove declared but unimplemented constructor
const'ify
Rename members to indicate they're URLs, not data
Download preview icon and use as decoration
Replace browser action with an in-app installation dialog (in progress)
Finish display, actions, progress report.
Fix querying payload size (needs to follow redirects)
Publish download progress as model item property
Finish display and actions.
Migrate newstuff config file to MarbleDirs, use new internal dialog.
Equal button width. Show disabled update button for !upgradadable ones
Strip summary and author tags with excessive size.

CCBUG: 319542
Restrict maximum size of shown text.

CCBUG: 319542
Fix some space inconsistencies, force relayouting on resize.

REVIEW: 110226
Note: Review request consists of the following commits:
beb86d0 Fix some space inconsistencies, force relayouting on resize.
3046305 Restrict maximum size of shown text.
7daf920 Strip summary and author tags with excessive size.
3088eeb Equal button width. Show disabled update button for !upgradadable ones
5455fdb Migrate newstuff config file to MarbleDirs, use new internal dialog.
aef3e29 Finish display and actions.
36eb204 Publish download progress as model item property
600e127 Fix querying payload size (needs to follow redirects)
4fc11ba Finish display, actions, progress report.
e0df23b Replace browser action with an in-app installation dialog (in progress)
3f8cfe0 Download preview icon and use as decoration
8c60cbc Rename members to indicate they're URLs, not data