Plug-in icons

[justint]

The plug-in could use some nicely designed icons to maintain a consistent and usable interface. The icon designs should follow the JetBrains UI design guidelines.

Here are some plug-in features that could benefit from icons:

• USD Filetype (already exists but needs to be updated)
• Structure view
  • Prims (now using PlatformIcons.PARAMETER_ICON)
  • Classes (now using PlatformIcons.CLASS_ICON)
  • Metadata (now using PlatformIcons.METHOD_ICON)
  • Properties
    • Attributes (now using PlatformIcons.PROPERTY_ICON)
    • Relationships
    • timeSampled properties - these could probably be marked italic and have some layered icon, like a clock or something to indicate that it's a timeSample
  • VariantSets
• Line marker provider
  • Over specifiers