Make the dimension picker only accept highlighted values between (1,1) and (maxColumns, maxRows), inclusive. This makes interacting with it via keyboardand mouse more consistent. This also improves a11y for the component.
Also fixes a type warning in setValue().

R=nicksantos
DELTA=66 (33 added, 5 deleted, 28 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6205


git-svn-id: http://closure-library.googlecode.com/svn/trunk@2472 0b95b8e8-c90f-11de-9d4f-f947ee5921c8
Fix positioning test that fails when the anchor is partially visible.

This is causing a failure when testing team is updating its
browser sizes.

R=chrishenry
DELTA=6 (4 added, 0 deleted, 2 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6206


git-svn-id: http://closure-library.googlecode.com/svn/trunk@2473 0b95b8e8-c90f-11de-9d4f-f947ee5921c8
Fix reference to private property in mockactivitymonitor.

R=chrishenry
DELTA=149 (128 added, 1 deleted, 20 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6207


git-svn-id: http://closure-library.googlecode.com/svn/trunk@2474 0b95b8e8-c90f-11de-9d4f-f947ee5921c8