TextFieldTextEditor: fix for Mac HiDPI
some theme documentation (references #811)
theme readme tweaks
Gallery: updated readme with more info about Flickr API
Examples: updated readmes to point to theme SWCs (references #813)
Themes: added missing styles for item renderer 'icon label'
Components Explorer: item renderer screen lets you display the icon as a label, display object, or texture, just like the accessory