Implement $map variable, which returns the current composer map item id where the map is being drawn, or 'canvas' if the map is being drawn in the main QGIS window. Partly implements #9288.
Change debug message level of CRS debug messages to keep the compiler warnings clean.
[Project-OWS-Tab] Doen't add null CRS to list

It was possible to add null CRS in the OWS Tab CRS list. To avoid it, I
add a test on return 0 as CRS Id and to set a default CRS with the last
in the OWS Tab CRS list.
debian packaging update: also disable globe in sid-oracle
fix most cppcheck warnings and implement suggestions
also update and sync some sip interfaces
german translation update
rephrase support (fixes #9294)
Fix warnings
[composer] update icons for atlas toolbar
[processing] port QGIS native field calculator
[processing] some refactoring as suggested by Nathan Woodrow
[composer] Tweak appearance of compositions so that it's still possible to see page edges when using a transparent paper style
[composer] Make sure atlas navigation controls are disabled if no matching atlas features are found