Updated SidebarLayout compose button styles and hide if no user

• Updated:
- SidebarLayout compose button styles and hide if no user

app/javascript/gabsocial/components/sidebar/sidebar_layout.js

@@ -91,16 +91,21 @@ class SidebarLayout extends React.PureComponent {
                 {children}
               </nav>
 
+              {
+                !!me &&
                 <Responsive min={BREAKPOINT_SMALL}>
                   <Button
-                  isBlock
                     onClick={this.handleOpenComposeModal}
-                  className={[_s.py15, _s.fs15PX, _s.fw600].join(' ')}
+                    className={_s.py15}
-                >
+                    icon='pencil'
-                  Gab
+                    iconSize='18px'
-                </Button>
+                    iconClassName={[_s.py5, _s.px5].join(' ')}
+                  />
                 </Responsive>
+              }
 
+              {
+                !!me &&
                 <Responsive max={BREAKPOINT_SMALL}>
                   <Button
                     onClick={this.handleOpenComposeModal}
@@ -108,6 +113,7 @@ class SidebarLayout extends React.PureComponent {
                     icon='pencil'
                   />
                 </Responsive>
+              }
 
             </div>
           </div>