update notebook quickhelp on new shortcuts
removing keyboard shortcuts should also update help
rebuild.QuickHelp event sets the dirty bit

QuickHelp is rebuilt on show if the dirty bit was set.
remove recreation of QuickHelp
first pass at capitalizing keyboard shortcuts
prettify combo keyboard shortcuts
fix capitalization of mode-switching keys
DRY: style in one place, removed code duplication
fix raw_input CSS

I had to express padding in px, not em for consistent appearance.
I'm not sure why.
fix ambiguous raw_input classes
simplify raw_input css

for once, vertical-align: baseline is the right choice
semicolon fixes buttress half of my js commits
don't color code in crimson

do alliterate, aforementioned color alternative alias is amaranth
remove stale modal dialog from the DOM
capitalize keyboard shortcuts in the tour
Respect '\r' characters in nbconvert.
Added test
wider style for keyboard shortcuts
Use regex instead
Added one more test, multiple \r on one line