Make timeline macro more customisable (#5947)

* make the timeline-macro more customizable

* changed comment as requested

core/wiki/macros/timeline.tid

@@ -3,14 +3,11 @@ modified: 20141212110330815
 tags: $:/tags/Macro
 title: $:/core/macros/timeline
 
-\define timeline-title()
-\whitespace trim
-<!-- Override this macro with a global macro 
-     of the same name if you need to change 
-     how titles are displayed on the timeline 
-     -->
-<$view field="title"/>
-\end
+<!-- Override one or both of the following two macros with a global or local macro of the same name 
+if you need to change how titles are displayed on a timeline -->
+
+\define timeline-title() <$view field="title"/>
+\define timeline-link() <$link to={{!!title}}><<timeline-title>></$link>
 \define timeline(limit:"100",format:"DDth MMM YYYY",subfilter:"",dateField:"modified")
 \whitespace trim
 <div class="tc-timeline">
@@ -19,7 +16,7 @@ title: $:/core/macros/timeline
 <$view field="$dateField$" format="date" template="$format$"/>
 <$list filter="[sameday:$dateField${!!$dateField$}!is[system]$subfilter$!sort[$dateField$]]">
 <div class="tc-menu-list-subitem">
-<$link to={{!!title}}><<timeline-title>></$link>
+<<timeline-link>>
 </div>
 </$list>
 </div>