CMake: armarx_gui_plugin fix failure if the plugin name contains 'GuiPlugin'

etc/cmake/UseArmarXGui.cmake

@@ -83,7 +83,8 @@ function(armarx_gui_plugin PLUGIN_NAME SOURCES QT_MOC_HDRS QT_UIS QT_RESOURCES C
     set(GENERATE_BASE_DIR "${CMAKE_CURRENT_BINARY_DIR}/${PLUGIN_NAME}_autogen/include")
 
     #gui plugin name
-    string(REPLACE "GuiPlugin" "" ARMARX_GUI_PLUGIN_PREFIX "${ARMARX_TARGET_NAME}")
+    # Make sure to remove only the last 'GuiPlugin' otherwise you cannot name your plugins '*GuiPlugin'
+    string(REGEX REPLACE "GuiPlugin$" "" ARMARX_GUI_PLUGIN_PREFIX "${ARMARX_TARGET_NAME}")
 
     #autogen header if none was supplied
     set(tmp_headers ${HEADERS})
@@ -104,7 +105,7 @@ function(armarx_gui_plugin PLUGIN_NAME SOURCES QT_MOC_HDRS QT_UIS QT_RESOURCES C
         list(REMOVE_DUPLICATES tmp_headers)
         list(LENGTH tmp_headers tmp_headers_len)
         if(NOT "1" STREQUAL "${tmp_headers_len}")
-            message(FATAL_ERROR "Failed to auto generate the GuiPlugin headers! Error: Can't find the widget controller")
+            message(FATAL_ERROR "Failed to auto generate the GuiPlugin headers! Error: Can't find the widget controller '${tmp_regex}'")
         endif()
         list(GET tmp_headers 0 tmp_hdr)
         set(ARMARX_GUI_PLUGIN_WIDGET_CONTROLLER_HEDER "${subdir}/${tmp_hdr}")