Bug 549481 - [Mac]API Tools error in Display.java

Putback the filter for MANIFEST.MF removed by previous commit as it causes API tools warning
in official build (Windows).

The API tools filters is common for all platforms. Some filters may be
platform specific. So, don't enable automatically remove unused filters. Also, set unused
problem filters to warning.

Change-Id: I15bfe4952a6fb47d7913d0074878aef00a924301
diff --git a/bundles/org.eclipse.swt/.settings/.api_filters b/bundles/org.eclipse.swt/.settings/.api_filters
index 3da34e6..a280165 100644
--- a/bundles/org.eclipse.swt/.settings/.api_filters
+++ b/bundles/org.eclipse.swt/.settings/.api_filters
@@ -486,4 +486,12 @@
             </message_arguments>
         </filter>
     </resource>
+    <resource path="META-INF/MANIFEST.MF">
+        <filter comment="Bug 548190 - Adding API Tools filter to hide the warning message in org.eclipse.swt project. For more details refer: https://bugs.eclipse.org/bugs/show_bug.cgi?id=548190#c23" id="926941240">
+            <message_arguments>
+                <message_argument value="3.112.0"/>
+                <message_argument value="3.111.0"/>
+            </message_arguments>
+        </filter>
+    </resource>
 </component>
diff --git a/bundles/org.eclipse.swt/.settings/org.eclipse.pde.api.tools.prefs b/bundles/org.eclipse.swt/.settings/org.eclipse.pde.api.tools.prefs
index e11abc2..47fac8a 100644
--- a/bundles/org.eclipse.swt/.settings/org.eclipse.pde.api.tools.prefs
+++ b/bundles/org.eclipse.swt/.settings/org.eclipse.pde.api.tools.prefs
@@ -88,8 +88,8 @@
 TYPE_PARAMETER_ELEMENT_TYPE_CHANGED_INTERFACE_BOUND=Error
 TYPE_PARAMETER_ELEMENT_TYPE_REMOVED_CLASS_BOUND=Error
 TYPE_PARAMETER_ELEMENT_TYPE_REMOVED_INTERFACE_BOUND=Error
-UNUSED_PROBLEM_FILTERS=Error
-automatically_removed_unused_problem_filters=Enabled
+UNUSED_PROBLEM_FILTERS=Warning
+automatically_removed_unused_problem_filters=Disabled
 changed_execution_env=Error
 eclipse.preferences.version=1
 incompatible_api_component_version=Error