Insert ui divider directly in templates instead of from inside heatmap vue component (#11508)

* ui: remove the divider between heatmap and feeds in the dashboard view

* this commit reverses 6ccd19ef86

Signed-off-by: surtur <a_mirre@utb.cz>

* add a divider to the default user dashboard view

* another one-line change, this time as a direct complement of
  2bfc71614c to implement a divider of
  sorts (as per 6ccd19ef86 originally)

Signed-off-by: surtur <a_mirre@utb.cz>

* removed the divider in heatmap.tmpl

* the separator is added by partial templates as needed

Signed-off-by: surtur <a_mirre@utb.cz>

* load proper dashboard template code in profile.tmpl

* as discussed in Discord
* includes a divider of its own

Signed-off-by: surtur <a_mirre@utb.cz>

web_src/js/components/ActivityHeatmap.vue

@@ -7,7 +7,6 @@
             {{ totalContributions }} total contributions in the last 12 months
         </h4>
         <calendar-heatmap v-show="!isLoading" :locale="locale" :no-data-text="locale.no_contributions" :tooltip-unit="locale.contributions" :end-date="endDate" :values="values" :range-color="colorRange"/>
-        <div class="ui divider"></div>
     </div>
 </template>