Panel: plugins panels can now reside outsude the app/panels directory, added example plugin panel
Graph: New series style override option 'Fill below to', useful to visualize max & min as shadow for the mean, #940
Graph: fill below to series override option not automatically adds lines=false, as overrides, if you want lines just for the fill below series just remove the overrides, #940
Graph: added typehead dropdown menu combination for the series override selection
Graph: fix for legends on the side and graph dimensions adaptation
Dashboard: removed wip stats panel from settings.js, accidental commit
Dashboard: fix for fullscreen mode and small gap sometimes showing the underlying dashboard
Graph: single series tooltip and unit format change fix, Closes #946
Graph: fix for second y axis tick unit labels wrapping on the next line, Fixes #505
Help: added help modal, accessed by shortcut '?', the help modal only contains a list of all shortcuts right now but will be extended in the future, #952