Change new prop isVariable to showListMessage to reflect the functionality of the prop

src/components/prompt/prompt.jsx

@@ -64,13 +64,13 @@ const PromptComponent = props => (
                 <div>
                     {props.isStage ?
                         <div className={styles.infoMessage}>
-                            {props.isVariable ? (
+                            {props.showListMessage ? (
                                 <FormattedMessage
-                                    {...messages.availableToAllSpritesMessage}
+                                    {...messages.listAvailableToAllSpritesMessage}
                                 />
                             ) : (
                                 <FormattedMessage
-                                    {...messages.listAvailableToAllSpritesMessage}
+                                    {...messages.availableToAllSpritesMessage}
                                 />
                             )}
                         </div> :
@@ -153,7 +153,7 @@ PromptComponent.propTypes = {
     defaultValue: PropTypes.string,
     globalSelected: PropTypes.bool.isRequired,
     isStage: PropTypes.bool.isRequired,
-    isVariable: PropTypes.bool.isRequired,
+    showListMessage: PropTypes.bool.isRequired,
     label: PropTypes.string.isRequired,
     onCancel: PropTypes.func.isRequired,
     onChange: PropTypes.func.isRequired,

src/containers/blocks.jsx

@@ -544,7 +544,7 @@ class Blocks extends React.Component {
                     <Prompt
                         defaultValue={this.state.prompt.defaultValue}
                         isStage={vm.runtime.getEditingTarget().isStage}
-                        isVariable={this.state.prompt.varType === VMScratchBlocks.SCALAR_VARIABLE_TYPE}
+                        showListMessage={this.state.prompt.varType === VMScratchBlocks.LIST_VARIABLE_TYPE}
                         label={this.state.prompt.message}
                         showCloudOption={this.state.prompt.showCloudOption}
                         showVariableOptions={this.state.prompt.showVariableOptions}

src/containers/prompt.jsx

@@ -60,7 +60,7 @@ class Prompt extends React.Component {
                 defaultValue={this.props.defaultValue}
                 globalSelected={this.state.globalSelected}
                 isStage={this.props.isStage}
-                isVariable={this.props.isVariable}
+                showListMessage={this.props.showListMessage}
                 label={this.props.label}
                 showCloudOption={this.props.showCloudOption}
                 showVariableOptions={this.props.showVariableOptions}
@@ -80,7 +80,7 @@ class Prompt extends React.Component {
 Prompt.propTypes = {
     defaultValue: PropTypes.string,
     isStage: PropTypes.bool.isRequired,
-    isVariable: PropTypes.bool.isRequired,
+    showListMessage: PropTypes.bool.isRequired,
     label: PropTypes.string.isRequired,
     onCancel: PropTypes.func.isRequired,
     onOk: PropTypes.func.isRequired,