Fix bug: ID: 3523296 Onion skin and tile render are broken: Mutex::Lock needs to be inside while condition.
Make missing layers to derive from Layer_NoDeform. It should help on optimize layers function.
Apply patch ID 3543027: Crash when loading 54-morevna.sif. Fixes bug that happens when BLine passed is empty.
Switch position for gradient and polygon tools in toolbox to have a more friendly layout of tools
Fix Bug #3536120:Toggle Snap to grid button tooltip incorrect, patch thanks jchadwick.
Rename params to parameters for UI
Rename curves to graphs for UI
Rename children to library for UI
Rename groups to sets for UI
Rename group to set for popup menu: action add/remove to/from set
Fix Set sub-menu of canvas window menu
Rename encapsulate to group for UI
Rename ducks to control points for UI
Rename inline/pasted canvas to group for UI:
rename inline canvas layer to group layer,
rename pasted canvas layer to group layer,
rename canvas parameter value from pasted canvas to group.
Rename bline to spline for UI
Rename parameter value BLine Point to Spline Point for UI
Make type_local_name translatable and type_name untranslatable
Rename type local name: bline_point to spline_point for UI
Fix Group Layer button on layer dock toolbar.
Update action_add_to_set icon