Add option to show only related tags

browser/main/SideNav/index.js

@@ -152,6 +152,11 @@ class SideNav extends React.Component {
     if (config.sortTagsBy === 'COUNTER') {
       tagList = _.sortBy(tagList, item => (0 - item.size))
     }
+    if (config.ui.showOnlyRelatedTags && (relatedTags.size > 0)) {
+      tagList = tagList.filter(
+        tag => tag.related
+      )
+    }
     return (
       tagList.map(tag => {
         return (

browser/main/modals/PreferencesModal/UiTab.js

@@ -66,6 +66,7 @@ class UiTab extends React.Component {
         language: this.refs.uiLanguage.value,
         showCopyNotification: this.refs.showCopyNotification.checked,
         confirmDeletion: this.refs.confirmDeletion.checked,
+        showOnlyRelatedTags: this.refs.showOnlyRelatedTags.checked,
         disableDirectWrite: this.refs.uiD2w != null
           ? this.refs.uiD2w.checked
           : false
@@ -210,6 +211,16 @@ class UiTab extends React.Component {
               {i18n.__('Show a confirmation dialog when deleting notes')}
             </label>
           </div>
+          <div styleName='group-checkBoxSection'>
+            <label>
+              <input onChange={(e) => this.handleUIChange(e)}
+                checked={this.state.config.ui.showOnlyRelatedTags}
+                ref='showOnlyRelatedTags'
+                type='checkbox'
+              />&nbsp;
+              {i18n.__('Show only related tags')}
+            </label>
+          </div>
           {
             global.process.platform === 'win32'
             ? <div styleName='group-checkBoxSection'>