Typo fix + Plugin configuration + UI specific file

Hello,

When I work with a team, we share some configurations in Jetbrain editors (Webstorm, PHPStorm, Intellij).

* We work with MongoDB and we use Mongo explorer plugin, which create mongoSettings file with DB configuration.
* If we work on non-specific editors (Like Intellij for PHP project), That IDE create useless informations in .idea/uiDesigner.xml

Samples :

mongoSettings.xml
```xml
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="MongoConfiguration">
    <option name="serverConfigurations">
      <list>
        <ServerConfiguration>
          <option name="label" value="The name" />
          <option name="serverUrls">
            <list>
              <option value="localhost:27017" />
            </list>
          </option>
          <option name="userDatabase" value="database" />
        </ServerConfiguration>
      </list>
    </option>
    <option name="shellPath" value="/path/to/bin/mongo" />
  </component>
</project>
```

uiDesigner.xml
```xml
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="Palette2">
    <group name="Swing">
      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
      </item>
      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
      </item>
      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.png" removable="false" auto-create-binding="false" can-attach-label="false">
        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
      </item>
      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.png" removable="false" auto-create-binding="false" can-attach-label="true">
        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
      </item>
      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.png" removable="false" auto-create-binding="true" can-attach-label="false">
        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
        <initial-values>
          <property name="text" value="Button" />
        </initial-values>
      </item>

      [...]

    </group>
  </component>
</project>
```

Regards,
Gaël