Removing checkmark and fixed Code Editor indentation

browser/main/modals/PreferencesModal/SnippetEditor.js

@@ -27,17 +27,12 @@ class SnippetEditor extends React.Component {
       dragDrop: false,
       foldGutter: true,
       gutters: ['CodeMirror-linenumbers', 'CodeMirror-foldgutter'],
-      autoCloseBrackets: (this.enableBracketMatching ? {
-        pairs: '()[]{}\'\'""$$**``ll',
-        triples: '```"""\'\'\'',
-        explode: '[]{}``$$',
+      autoCloseBrackets: {
+        pairs: this.props.matchingPairs,
+        triples: this.props.matchingTriples,
+        explode: this.props.explodingPairs,
         override: true
-      }:  {
-        pairs: '',
-        triples: '',
-        explode: '',
-        override: true
-      }),
+      },
       mode: 'null'
     })
     this.cm.setSize('100%', '100%')

browser/main/modals/PreferencesModal/SnippetTab.js

@@ -136,7 +136,6 @@ class SnippetTab extends React.Component {
               enableRulers={config.editor.enableRulers}
               rulers={config.editor.rulers}
               displayLineNumbers={config.editor.displayLineNumbers}
-              enableBracketMatching={config.editor.enableBracketMatching}
               matchingPairs={config.editor.matchingPairs}
               matchingTriples={config.editor.matchingTriples}
               explodingPairs={config.editor.explodingPairs}

browser/main/modals/PreferencesModal/UiTab.js

@@ -95,7 +95,6 @@ class UiTab extends React.Component {
         enableTableEditor: this.refs.enableTableEditor.checked,
         enableFrontMatterTitle: this.refs.enableFrontMatterTitle.checked,
         frontMatterTitleField: this.refs.frontMatterTitleField.value,
-        enableBracketMatching: this.refs.enableBracketMatching.checked,
         matchingPairs: this.refs.matchingPairs.value,
         matchingTriples: this.refs.matchingTriples.value,
         explodingPairs: this.refs.explodingPairs.value
@@ -543,17 +542,6 @@ class UiTab extends React.Component {
             </label>
           </div>
 
-          <div styleName='group-checkBoxSection'>
-            <label>
-              <input onChange={(e) => this.handleUIChange(e)}
-                checked={this.state.config.editor.enableBracketMatching}
-                ref='enableBracketMatching'
-                type='checkbox'
-              />&nbsp;
-              {i18n.__('Enable bracket matching')}
-            </label>
-          </div>
-
           <div styleName='group-section'>            
             <div styleName='group-section-label'>
               {i18n.__('Matching character pairs')}