tab: Remove unnecessary whitespace
browser: Implement save mode
browser: Refactor input
io: Remove unused code
ui: Invalidate on screen resize
tab: Use warning style on the download page
tab: Minor cleanup
text: Increase padding
config: Add clone binding
tab: Refactor cloning
tab: Implement certificate creation page
tab: Don't show error page for ErrNotTrusted
doc: Document jump mode
browser: Implement support for jumping to headings

Resolves #18
ui/view: Remove focus variable
Update dependencies
doc: Document follow mode
config: Rename hints to follow
tab: Improve duplicate page removal
tab: Prevent duplicate history entries

Resolves #55