as an emergency measure for shipping 2.0 beta 1

See the comment for why. Probably related to scrollspy

[FIX JENKINS-33767] Only show the upgrade banner when Jenkins is in charge

Test code needs to now execute in the request scope for us to be able to
determine if Jenkins object is in charge or not

[JENKINS-31162] New item categorization

More concise welcome text for Jenkins 2

[JENKINS-33557] - connectivity checks may cause setup wizard to hang for a long time

Put focus back on item name input after item selection if name is empty

The item name entry is given focus at the start, but loses it of the user selects an item. This changes puts focus back (post item selection) on the name input if it's empty.

Sort the items within each category

Fix scroll on click bug

Resize new item page tabbar based on form resize

Conflicts:
	cli/pom.xml
	core/pom.xml
	pom.xml
	test/pom.xml
	war/pom.xml

Fix more funky scrolling + sticky tabbar issues

Minimum number of tabs to show.

[JENKINS-33728] - Remove stray getActiveInstance call in layout.jelly

timeout, this may be modified with the configuration property:
jenkins.proxy.default_connect_timeout_millis, a value of 0 will restore
the previous behavior

Ignore the window scroll event that's generated from the repositioning of the new item page tabbar

Repositioning of the tabbar causes a scroll event to happen, which causes tab activation/reactivation, which in turn causes a further autoscroll etc etc. Is the cause of the weird scrolling behavior as seen by @daniel-beck.