Drop "?" (Help) from DatasetActions list -- it's confusing since it just

runs rerun.  This used to pop up the tool help text in the panel, but
the display was always awkward and it never found much use.  Current
implementation does exactly what rerun does (literally called rerun
method).

client/src/components/History/Content/Dataset/DatasetActions.vue

@@ -172,10 +172,6 @@ function onHighlight() {
                     @click.stop="onHighlight">
                     <FontAwesomeIcon :icon="faSitemap" />
                 </BButton>
-
-                <BButton v-if="showRerun" class="px-1" title="Help" size="sm" variant="link" @click.stop="onRerun">
-                    <FontAwesomeIcon :icon="faQuestion" />
-                </BButton>
             </div>
         </div>
     </div>

client/src/utils/navigation/navigation.yml

@@ -180,7 +180,6 @@ history_panel:
       # Action buttons...
       download_button: '${_} .download-btn'
       info_button: '${_} .params-btn'
-      tool_help_button: '${_} .fa.fa-question'
       rerun_button: '${_} .rerun-btn'
       alltags: '${_} .stateless-tags .tag'
 

client/src/utils/navigation/schema.ts

@@ -101,7 +101,6 @@ interface Roothistory_panelitem extends Component {
     delete_button: SelectorTemplate;
     download_button: SelectorTemplate;
     info_button: SelectorTemplate;
-    tool_help_button: SelectorTemplate;
     rerun_button: SelectorTemplate;
     alltags: SelectorTemplate;
 }