Better directed and curved edges, bug fixes, and documentation updates

ENHANCEMENT: #341 Default configuration restructured to reduce redundancies
ENHANCEMENT: #304 Better placement of curved edges and directed arrows
ENHANCEMENT, DOCS: #358 Documentation sidebar categories do not link on close

BUG: #292 White theme built by default (Temporary CSS, will be replaced with programmatic styles)
BUG: #367 and #321 Clustering control matches Control Dash styles
BUG: #339 Control Dash does not overflow
BUG, DOCS: #336 Fix sidebar scrolling bug in documentation
BUG, DOCS: #335 Up arrow on documentation is clickable and not covered by download button

DOCS: #338 Dynamic clustering included in documentation
DOCS: #259 Edge id requirements documented