Updated CHANGELOG (markdown)

CHANGELOG.md

@@ -23,7 +23,7 @@
    - Glip
 - Enable/Disable services.
 - Enhance zooming with shortcuts (<kbd>Ctrl</kbd><kbd>+</kbd>, <kbd>Ctrl</kbd> <kbd>-</kbd> and <kbd>Ctrl</kbd><kbd>MouseWheel</kbd>).
-- Mouse back button support (only Windows).
+- Mouse back button support. ![win]
 - Added Outlook and Inbox Desktop Notifications.
 - Fixed icon dock size in Mac.
 - Fixed Slack unread badge.
@@ -31,12 +31,12 @@
 - Added "Show System Tray indicator on unread messages" preference.
 - Open Hangouts attachments.
 - Switch from double click to right click in service tab to open menu.
-- Persistent Dont Disturb.
+- Persistent Don't Disturb.
 - Paste without formatting option in Menu.
 - Fixed focus bug on switching services.
 - Fixed application name in Windows Task Manager.
 - Fixed icon size on Windows Volume Mixer.
-- Fixed Fedora bug on install AppImage.
+- Fixed Fedora bug on install AppImages.
 - Allow keep session alive in Wire.
 - Added RPM build outputs.
 - Fixed HipChat initial page.
@@ -199,3 +199,6 @@ options. That's all, don't freak out!).
 
 First release for this awesome app.
 
+[win]: <https://i-msdn.sec.s-msft.com/dynimg/IC721376.jpeg> "Windows"
+[linux]: <https://reference.digilentinc.com/_media/reference/software/linux-icon.png> "Linux"
+[osx]: <http://www.datapro.net/images/AppleLogo.jpg> "macOS"