update NEWS for 1.18, also add 1.16.2 entries

NEWS

@@ -1,15 +1,22 @@
-### mate-terminal 1.17.1
+### mate-terminal 1.18.0
 
-### mate-terminal 1.17.0
-
-  * Allow closing tabs with mouse middle button click
-  * Make dropped tab active
-  * Re-add warning on closing terminal when foreground process
-    is running
-  * Fix crash on tab drag-n-drop
-  * Fix window size when second tab is added by drag-n-drop
+  * NEWS: use consistent, project wide, markdown-like formatting
+    to make generating release announcements easier
+  * Add ability to close tabs with middle mouse button
   * Translations update
 
+### mate-terminal 1.16.2
+
+  * Bring back exit confirmation when there's a process running
+  * Fix possible crash on window closing
+  * Fix various issues with drag-n-drop of tabs
+  * Encodings and keybindings dialogs: fix expand of content on
+    window resize
+  * Find, profile manager, profile prefs dialogs: fix runtime
+    warnings about transient parent
+  * Attach popup menus to their parent widgets (useful on Wayland)
+  * Force X11 backend
+
 ### mate-terminal 1.16.1
 
   * Fix crash after detaching tab and then changing its title