Merge pull request #4974 from ericrosenbaum/feature/sound-editor-selection4

package.json

src/components/asset-panel/asset-panel.css

src/components/audio-trimmer/audio-selector.jsx

src/components/audio-trimmer/audio-trimmer.css

src/components/audio-trimmer/audio-trimmer.jsx

src/components/audio-trimmer/icon--handle.svg

src/components/audio-trimmer/playhead.jsx

src/components/audio-trimmer/selection-handle.jsx

src/components/icon-button/icon-button.css

src/components/icon-button/icon-button.jsx

src/components/sound-editor/icon--copy-to-new.svg

src/components/sound-editor/icon--copy.svg

src/components/sound-editor/icon--delete.svg

src/components/sound-editor/icon--fade-in.svg

src/components/sound-editor/icon--fade-out.svg

src/components/sound-editor/icon--lounder.svg

src/components/sound-editor/icon--mute.svg

src/components/sound-editor/icon--paste.svg

src/components/sound-editor/icon--play.svg

src/components/sound-editor/icon--stop.svg