RR/UK: use browser protocol for content
Making sure to deal with charts that have multiple language labels; closes #926
WM: Added media list on dataset page
WM: Upload button added
WM: List-images for media files
WM: Non-highlightable dropdown menus; closes #739
WM: Accordion togglers, open/closed state
WM: Closed stated hides content
WM: Sideblock and accordion max-heights
WM: Responsive heights for datasetnav blocks
WM: Hover state tests, navbar max-width
WM: Accordion togglers pseudo:checked
WM: Checkbox toggling and color states
WM: Scrollable togglable media list
WM: Uploaded file display and form
WM: Confirm media file delete modal
WM: Overflow scroll on dataset sidebar
WM: Top level root accordion font-sizes
WM: Spacing for extendable panels and sidebar; closes #876
RR: wip list media