Updates to composer window

- Split composer toolbar into many
- Rename File menu to Composer - because the composer isn't a "file"
attempt to fix crash when changing symbols in graduated renderer
Fix #7196, composer manager doesn't close when showing a chosen composer

- Fix zoom-to-full when composer window is shown
Fix: emit committedFeaturesAdded and committedFeaturesRemoved
Add New and Manager actions to new Composer menu in composer
Add binding to iface for action to show composer manager
Run prepare-commit on qgscomposer.cpp
Merge pull request #432 from matthias-kuhn/fix-vector-layer-signals

Fix: emit committedFeaturesAdded and committedFeaturesRemoved
fix bug 7167, scale entered by user should work as expected
Merge branch 'master' of http://github.com/amitkulz/Quantum-GIS