UI: Remove dock margins

UI/forms/OBSBasic.ui

@@ -188,7 +188,7 @@
      <x>0</x>
      <y>0</y>
      <width>1079</width>
-     <height>21</height>
+     <height>22</height>
     </rect>
    </property>
    <widget class="QMenu" name="menu_File">
@@ -426,17 +426,20 @@
    </attribute>
    <widget class="QWidget" name="dockWidgetContents_2">
     <layout class="QVBoxLayout" name="verticalLayout_6">
+     <property name="spacing">
+      <number>0</number>
+     </property>
      <property name="leftMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="topMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="rightMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="bottomMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <item>
       <widget class="QFrame" name="scenesFrame">
@@ -558,17 +561,20 @@
    </attribute>
    <widget class="QWidget" name="dockWidgetContents_6">
     <layout class="QVBoxLayout" name="verticalLayout_5">
+     <property name="spacing">
+      <number>0</number>
+     </property>
      <property name="leftMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="topMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="rightMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="bottomMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <item>
       <widget class="QFrame" name="sourcesFrame">
@@ -691,17 +697,20 @@
    </attribute>
    <widget class="QWidget" name="dockWidgetContents_7">
     <layout class="QVBoxLayout" name="verticalLayout_4">
+     <property name="spacing">
+      <number>0</number>
+     </property>
      <property name="leftMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="topMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="rightMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <property name="bottomMargin">
-      <number>4</number>
+      <number>0</number>
      </property>
      <item>
       <widget class="QStackedWidget" name="stackedMixerArea">
@@ -729,7 +738,7 @@
           <rect>
            <x>0</x>
            <y>0</y>
-           <width>80</width>
+           <width>71</width>
            <height>16</height>
           </rect>
          </property>