prevents the mouse wheel from scrolling the page when the user is focused on the lbc form element

fixes mousewheel lbc actions on creating publish

ui/component/channelCreate/view.jsx

@@ -147,6 +147,7 @@ class ChannelCreate extends React.PureComponent<Props, State> {
             error={newChannelBidError}
             value={newChannelBid}
             onChange={event => this.handleNewChannelBidChange(parseFloat(event.target.value))}
+            onWheel={e => e.stopPropagation()}
           />
           <div className="card__actions">
             <Button

ui/component/publishName/view.jsx

@@ -113,6 +113,7 @@ function PublishName(props: Props) {
             error={bidError}
             disabled={!name}
             onChange={event => updatePublishForm({ bid: parseFloat(event.target.value) })}
+            onWheel={e => e.stopPropagation()}
             helper={
               <BidHelpText
                 uri={'lbry://' + name}