UV Editor

Currently, the UV editor has a bunch of confusingly overlapping tool-modes. This should all be simplified via the new active tools system.

• Add Radius, Strength and the other relevant UV Sculpt settings to the tool settings & top bar
• Add Grab tool to the toolbar
• Add Rotate tool to the toolbar
• Add Scale tool to the toolbar
• Add Scale Cage tool to the toolbar
• Add Pan & Zoom gizmos in top right corner, same as 3d view.
• Add the Placement option to the Annotate tool settings (Current default is to only draw in the view, which is not so useful)
• Add Shear tool to the toolbar
• Split UV Editor from Image Editor
• Remove old tools panels
• Add 2D Cursor tool to toolbar
• Add Transform tool to the toolbar
• Make the Transform Scale Cage Gizmo only appear when Scale Cage transform tool is used
• Fix Annotate tool in the toolbar, so that it actually works
• Add UV Sculpt tools to the toolbar

When in the Image Editor Paint Mode, we should follow the design of the Paint modes in the 3D View, meaning;

• Tool Settings should be in top bar
• Toolbar should work the same as in 3D View