Fixed HTTP receiver exception

Fixed a possible exception while opening the custom HTTP receiver settings

Author: Michael Wangler

src/Logbert/App.config

@@ -592,7 +592,7 @@
         <value>False</value>
       </setting>
       <setting name="PnlCustomHttpSettingsPollTime" serializeAs="String">
-        <value>0</value>
+        <value>5</value>
       </setting>
       <setting name="PnlCustomHttpSettingsTimeout" serializeAs="String">
         <value>10000</value>

src/Logbert/Properties/Settings.Designer.cs

@@ -573,7 +573,7 @@
       <Value Profile="(Default)">False</Value>
     </Setting>
     <Setting Name="PnlCustomHttpSettingsPollTime" Type="System.Int32" Scope="User">
-      <Value Profile="(Default)">0</Value>
+      <Value Profile="(Default)">5</Value>
     </Setting>
     <Setting Name="PnlCustomHttpSettingsTimeout" Type="System.Int32" Scope="User">
       <Value Profile="(Default)">10000</Value>