Add the missing setupIECssClasses function

The setupIECssClasses function, which IE6/7/8 require to render the
HTML/CSS pokey properly, disappeared between PS10 and 11 in
Id1b837f3a0f983b89935f0003367705a92d10cee.

Bug: 66567
Change-Id: Ic0a760612a1271b724a7ced4efae96b14f2384d4
Don't draw a line between the pokey and guider

mw.libs.guiders._getAttachCss styles the guider and pokey with floating
point top and left properties, which Chrome seems to treat differently
from Firefox and Safari.

Work around this issue by converting the top and left properties to
integers.

Bug: 66567
Change-Id: I6b4450f4f94fce5dc14ac1fea05314e0850c1896
Merge "Add the missing setupIECssClasses function"
Merge "Don't draw a line between the pokey and guider"