FEM: icons, rename solver analysis frequency

src/Mod/Fem/Gui/DlgSettingsFemCcx.ui

@@ -245,7 +245,7 @@
              </property>
              <property name="icon">
               <iconset resource="Resources/Fem.qrc">
-               <normaloff>:/icons/fem-frequency-analysis.svg</normaloff>:/icons/fem-frequency-analysis.svg</iconset>
+               <normaloff>:/icons/fem-solver-analysis-frequency.svg</normaloff>:/icons/fem-solver-analysis-frequency.svg</iconset>
              </property>
             </item>
             <item>

src/Mod/Fem/Gui/Resources/Fem.qrc

@@ -48,7 +48,6 @@
         <file>icons/fem-femmesh-result.svg</file>
         <file>icons/fem-femmesh-to-mesh.svg</file>
         <file>icons/fem-fluid-section.svg</file>
-        <file>icons/fem-frequency-analysis.svg</file>
         <file>icons/fem-inp-editor.svg</file>
         <file>icons/fem-material.svg</file>
         <file>icons/fem-material-fluid.svg</file>
@@ -69,6 +68,7 @@
         <file>icons/fem-post-result-show.svg</file>
         <file>icons/fem-post-results-purge.svg</file>
         <file>icons/fem-shell-thickness.svg</file>
+        <file>icons/fem-solver-analysis-frequency.svg</file>
         <file>icons/fem-solver-analysis-static.svg</file>
         <file>icons/fem-solver-analysis-thermomechanical.svg</file>
         <file>icons/fem-solver-control.svg</file>