improved UI layouts description

extended_controls.ui

@@ -40,18 +40,18 @@
     </size>
    </property>
   </widget>
-  <widget class="QWidget" name="layoutWidget">
+  <widget class="QWidget" name="">
    <property name="geometry">
     <rect>
-     <x>1120</x>
-     <y>9</y>
-     <width>150</width>
+     <x>1121</x>
+     <y>10</y>
+     <width>146</width>
      <height>671</height>
     </rect>
    </property>
-   <layout class="QVBoxLayout" name="verticalLayout_4">
+   <layout class="QVBoxLayout" name="mainLayout">
     <item>
-     <layout class="QVBoxLayout" name="verticalLayout_2">
+     <layout class="QVBoxLayout" name="visualizationLayout">
       <item>
        <widget class="QLabel" name="label_3">
         <property name="text">
@@ -158,10 +158,7 @@
      </layout>
     </item>
     <item>
-     <layout class="QFormLayout" name="formLayout">
-      <property name="fieldGrowthPolicy">
-       <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
-      </property>
+     <layout class="QGridLayout" name="extControlsLayout">
       <item row="0" column="0">
        <widget class="QSlider" name="changezblambda">
         <property name="sizePolicy">
@@ -190,7 +187,7 @@
       <item row="0" column="1">
        <widget class="QLabel" name="label_lambda">
         <property name="text">
-         <string>lambda</string>
+         <string>λ</string>
         </property>
        </widget>
       </item>
@@ -246,7 +243,7 @@
      </layout>
     </item>
     <item>
-     <layout class="QVBoxLayout" name="verticalLayout_3">
+     <layout class="QVBoxLayout" name="optionsLayout">
       <item>
        <widget class="QCheckBox" name="shrinkAll">
         <property name="text">
@@ -273,7 +270,7 @@
      </layout>
     </item>
     <item>
-     <layout class="QGridLayout" name="gridLayout">
+     <layout class="QGridLayout" name="slidersLayout">
       <item row="0" column="1">
        <widget class="QLabel" name="label_6">
         <property name="text">
@@ -355,7 +352,7 @@
      </layout>
     </item>
     <item>
-     <layout class="QVBoxLayout" name="verticalLayout">
+     <layout class="QVBoxLayout" name="buttonsLayout">
       <item>
        <widget class="QPushButton" name="reCenter">
         <property name="text">

panowindow1.ui

@@ -49,9 +49,9 @@
      <height>671</height>
     </rect>
    </property>
-   <layout class="QVBoxLayout" name="verticalLayout_4">
+   <layout class="QVBoxLayout" name="mainLayout">
     <item>
-     <layout class="QVBoxLayout" name="verticalLayout">
+     <layout class="QVBoxLayout" name="visualizationLayout">
       <item>
        <widget class="QLabel" name="label_3">
         <property name="text">
@@ -148,7 +148,7 @@
      </layout>
     </item>
     <item>
-     <layout class="QVBoxLayout" name="verticalLayout_2">
+     <layout class="QVBoxLayout" name="optionsLayout">
       <item>
        <widget class="QCheckBox" name="shrinkAll">
         <property name="text">
@@ -175,7 +175,7 @@
      </layout>
     </item>
     <item>
-     <layout class="QGridLayout" name="gridLayout">
+     <layout class="QGridLayout" name="slidersLayout">
       <item row="0" column="1">
        <widget class="QLabel" name="label_6">
         <property name="sizePolicy">
@@ -317,7 +317,7 @@
      </layout>
     </item>
     <item>
-     <layout class="QVBoxLayout" name="verticalLayout_3">
+     <layout class="QVBoxLayout" name="buttonsLayout">
       <item>
        <widget class="QPushButton" name="reCenter">
         <property name="text">