Improve emojis - use SVGs where possible

app/assets/javascripts/components/features/compose/components/emoji_picker_dropdown.jsx

@@ -43,7 +43,7 @@ const EmojiPickerDropdown = React.createClass({
     return (
       <Dropdown ref={this.setRef} style={style}>
         <DropdownTrigger className='emoji-button' title={intl.formatMessage(messages.emoji)} style={{ fontSize: `24px`, width: `24px`, lineHeight: `24px`, display: 'block', marginLeft: '2px' }}>
-          <img className="emojione" alt="🙂" src="/emoji/1f602.png" />
+          <img draggable="false" className="emojione" alt="🙂" src="/emoji/1f602.svg" />
         </DropdownTrigger>
 
         <DropdownContent className='dropdown__left'>

app/assets/javascripts/components/features/getting_started/index.jsx

@@ -41,7 +41,7 @@ const GettingStarted = ({ intl, me }) => {
         <ColumnLink icon='sign-out' text={intl.formatMessage(messages.sign_out)} href='/auth/sign_out' method='delete' />
       </div>
 
-      <div className='scrollable optionally-scrollable'>
+      <div className='scrollable optionally-scrollable' style={{ display: 'flex', flexDirection: 'column' }}>
         <div className='static-content getting-started'>
           <p><FormattedMessage id='getting_started.about_addressing' defaultMessage='You can follow people if you know their username and the domain they are on by entering an e-mail-esque address into the form at the top of the sidebar.' /></p>
           <p><FormattedMessage id='getting_started.about_shortcuts' defaultMessage='If the target user is on the same domain as you, just the username will work. The same rule applies to mentioning people in statuses.' /></p>