[css-transitions-2] Integrate owning element section into starting transitions section

Author: birtles

css-transitions-2/Overview.bs

@@ -104,6 +104,12 @@ of the transition's associated [=animation effect=].
 
 # Starting of transitions # {#starting}
 
+The <dfn>owning element</dfn> of a transition refers to the element or
+pseudo-element to which the 'transition-property' property was applied that
+generated the animation.
+A transition may be disassociated from its [=owning element=]
+such that it has no [=owning element=].
+
 The set of [=running transitions=] includes
 only those transitions that have an [=owning element=].
 
@@ -112,7 +118,7 @@ it must disassociate the transition from its [=owning element=]
 and run the procedure to [=cancel an animation=] on the transition.
 
 Although not explicitly defined by level 1 of this specification,
-in addition to [=cancel|cancelling=] transitions on elements that
+in addition to [=cancel|canceling=] transitions on elements that
 are no longer [=connected=],
 implementations must also [=cancel=] any running transitions
 on elements that are no longer [=being rendered=] and
@@ -132,15 +138,6 @@ Each time a new transition is generated, the current value of the (already
 incremented) <a>current transition generation</a> is stored as the
 transition's <dfn>transition generation</dfn>.
 
-## Owning element ## {#owning-element-section}
-
-The <dfn>owning element</dfn> of a transition refers to the element or
-pseudo-element to which the 'transition-property' property was applied that
-generated the animation.
-
-A transition may be disassociated from its [=owning element=]
-such that it has no [=owning element=].
-
 # Application of transitions # {#application}
 
 ## Animation composite order ## {#animation-composite-order}