Make sure Piwik works on IE8+

[mattab]

Let's test Piwik on Internet Explorer 8 and make sure all still works: annotations, graphs, menus, admin, adding site, user, etc.

See forum post: http://forum.piwik.org/read.php?2,106854,page=1#msg-107532

• Sparklines have black background
• Visitor profile does not show
• Settings - Users: Websites selector is not placed correct

[mattab]

In 0d1b8d9: Refs #4300 Adding Array.reduce fallback for IE8. Array.reduce is used in jqplot.

[MaxWinterstein]

black background error is real. all website dashboard has black background. url-encoded request looks like:

index.php?module=MultiSites&action=getEvolutionGraph&period=month&date=2011-06-01,2013-11-30&evolutionBy=visits&columns=nb_visits&idSite=19&idsite=19&viewDataTable=sparkline&colors={"backgroundColor":"#aNaNaN","lineColor":"#162c4a","minPointColor":"#ff7f7f","maxPointColor":"#75bf7c","lastPointColor":"#55aaff"}

take a look at: "backgroundColor":"#aNaNaN"

not so in reverse engineering, but this looks like the problem. when i put #ffffff in everything is fine. cant find aNaNaN anywhere in source code, so it seems like a error-return-value from a function that looks for the background?

[tsteur]

In 111ac55: refs #4300 fixes the list of visited urls is not aligned on the right on ie8

[tsteur]

In 163e659: refs #4300 fixes sparklines have black background in ie8

[tsteur]

In c110f76: refs #4300 fix position of websites selector in users settings

[tsteur]

Please reopen if someone finds more issues.

[mattab]

good stuff Thomas, users stuck on IE8 will appreciate!