Aggregate issue for all the stuff we need to do but too lazy to create new issues

General:

• Rename UTs for better consistency
• Add UTs for ModelView morphs and geometry types
• Add UTs for subattribute names lookup
• Revisit legacy URHO3D_TESTING macro
• Use ConstString more often
• Refactor command line parsing
• Revisit StateManager and make it compatible with new Editor plugins \
• Update copyrights
• Move static utility methods from Node

Editor:

• Drag&drop files into Resource Browser
• Double click to focus
• Range selection in Resource Browser
• Copy-paste in Resource Browser. To OS as well?
• Extract code to ResourceBrowserWidget
• Preview Materials
• Preview Animations in AnimationController?
• Texture Inspector
• Particle Editor
• Texture atlas utils
• Preview Drag&drop
• Preview Models
• Preview Texture
• Drag&drop resources into scene
• Revisit plugin discovery and handling. This should fit with .net developmentworkflow
• Not every viewer should be opened by default
• Move the CoreData to Editor and Player assets, the game shall only have Data folder. This way is easier to update shaders, etc.
• revisit asset delivery (NPM packages or alternatives, how to handle various target platforms, etc)
• Hot key bindings and hints (display hot key next to UI button if shift/alt/ctrl is pressed)
• Delete button should not delete nodes when textbox is in focus
• Unknown component handling (editor should be able to load and save correct scene file even if not every component is known to it)
• Prebuilt editor available from github releases page
• When editor creates a new project it should populate c++/c# project structure too
• Snapping to grid (i.e. when moving from 0.021 it should snap to 0.0 and 0.1, not 0.121)
  Ability to open prefab from a button in the inspector