Audio caching more functional, opening other documents properly plays audio

Popup now renders in viewport

Draggable popup

Fix translation caching for popup selection

Nav bar in reader view

Audio, seeker, master play, sentence-level play, page turning working fine

Merge pull request #9 from rogervillanueva/selection_translate

More accurate master play sentence highlighting

Smart cache

Added detailed popup when clicking and dragging over a selection

Add click to drag translate function

Merge pull request #6 from rogervillanueva/codex/update-document-display-format-for-translation

Improve contextual translation batching

Fix reader playback chaining and popup duplicates

Use translation provider for reader popover