Fixed #1006
Small refactoring for scene grids
Fixed grid initialization in 2D model
GridParemeters moved to namespace
Temp fix for untranslatable 'Show grid'
Restored spaces in 2d model .ui file
Merge branch 'master' of github.com:qreal/qreal into robots

Conflicts:
	qrgui/view/editorViewScene.h
Added forgotten includes
Merge pull request #1021 from dvvrd/robots

Fixed #1006