docs: remove part of docs that says Shape-Out 2 cannot do LMM (#55)

docs/sec_interface.rst

@@ -42,15 +42,6 @@ your data analysis from Shape-Out 1 to Shape-Out 2:
   could be possible to convert sessions (including the corresponding
   .tdms files), but the effort in doing so would probably exceed the
   effort required to just rebuild a clean analysis session in Shape-Out 2.
-- Shape-Out 2 does not provide a linear mixed effects models
-  (LMM) analysis. LMM analysis in Shape-Out 1 is done using
-  `R/lme4 <https://cran.r-project.org/web/packages/lme4/>`_ and thus
-  requires a full R distribution shipped with Shape-Out 1. This
-  blows up the installation size and makes it more difficult to deploy.
-  Furthermore (and we are not saying that LMM Analysis is "bad") we are
-  also looking into other methods for determining statistical significance
-  which might be more intuitive to understand.
-
 
 
 Terminology

shapeout2/gui/main.ui

@@ -465,7 +465,8 @@
   </action>
   <action name="actionComputeSignificance">
    <property name="icon">
-    <iconset theme="statistical_significance"/>
+    <iconset theme="statistical_significance">
+     <normaloff>.</normaloff>.</iconset>
    </property>
    <property name="text">
     <string>Statistical &amp;significance...</string>