Moving cursor no longer puts focus on timestamp and speaker labels (#103)

* Added contentEditable = false to timestamp and speaker element to prevent selection by cursor

* Moved contentEditable tag to parent div, solves problem with cursor moving to speaker label

Author: murezzda

src/lib/TranscriptEditor/TimedTextEditor/WrapperBlock.js

@@ -97,7 +97,8 @@ class WrapperBlock extends React.Component {
 
     return (
       <div className={ style.WrapperBlock }>
-        <div className={ style.markers }>
+        <div className={ style.markers }
+          contentEditable={ false }>
           {this.props.blockProps.showSpeakers ? speakerElement : ''}
           {this.props.blockProps.showTimecodes ? timecodeElement : ''}
         </div>