Doc: Describe new filters in Issues pane

... for Clang Code Model and Python.

Change-Id: I4a1844137874c5c2c4bd3f0348879cf4c40ceda0
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

doc/src/howto/creator-ui.qdoc

@@ -403,6 +403,10 @@
         \li \uicontrol {Build System} - Errors and warnings encountered during a
             build.
 
+        \li \uicontrol {Clang Code Model} -
+            \l {Parsing C++ Files with the Clang Code Model}
+            {Errors and warnings from the current editor}.
+
         \li \uicontrol Compile - Selected output from the compiler. Open the
             \uicontrol {Compile Output} pane for more detailed information.
 
@@ -422,6 +426,8 @@
             by \l{Showing Task List Files in Issues Pane}
             {code scanning and analysis tools}.
 
+        \li \uicontrol Python - Runtime errors and exceptions of Python scripts.
+
         \li \uicontrol QML - Errors in QML syntax.
 
         \li \uicontrol {QML Analysis} - Results of the JavaScript