make lineWrapping configurable

browser/main/Detail/SnippetNoteDetail.js

@@ -720,6 +720,7 @@ class SnippetNoteDetail extends React.Component {
             mode={snippet.mode || (autoDetect ? null : config.editor.snippetDefaultLanguage)}
             value={snippet.content}
             linesHighlighted={snippet.linesHighlighted}
+            lineWrapping={config.editor.lineWrapping}
             theme={config.editor.theme}
             fontFamily={config.editor.fontFamily}
             fontSize={editorFontSize}

browser/main/lib/ConfigManager.js

@@ -50,6 +50,7 @@ export const DEFAULT_CONFIG = {
     fontFamily: win ? 'Consolas' : 'Monaco',
     indentType: 'space',
     indentSize: '2',
+    lineWrapping: true,
     enableRulers: false,
     rulers: [80, 120],
     displayLineNumbers: true,

browser/main/modals/PreferencesModal/UiTab.js

@@ -546,6 +546,17 @@ class UiTab extends React.Component {
             </label>
           </div>
 
+          <div styleName='group-checkBoxSection'>
+            <label>
+              <input onChange={(e) => this.handleUIChange(e)}
+                checked={this.state.config.editor.lineWrapping}
+                ref='editorLineWrapping'
+                type='checkbox'
+              />&nbsp;
+              {i18n.__('Wrap line in Snippet Note')}
+            </label>
+          </div>
+
           <div styleName='group-checkBoxSection'>
             <label>
               <input onChange={(e) => this.handleUIChange(e)}