UI: Adjust list style of scenes and sources

Exact same set of changes as before, but additionally remove the
margins from the items since it was artificially increasing the
spacing between them.

UI/data/themes/Yami.qss

@@ -171,12 +171,16 @@ QListWidget::item {
     color: palette(text);
 }
 
+SceneTree,
+SourceTree {
+    padding: 3px;
+}
+
 SceneTree::item,
 SourceTree::item {
-	padding: 3px;
+    border-radius: 4px;
+    padding: 6px;
     color: palette(text);
-	margin-bottom: 1px;
-	margin-top: 1px;
 	border: 0px solid transparent;
 }
 
@@ -1093,6 +1097,11 @@ LockedCheckBox {
     margin-left: -2px;
 }
 
+LockedCheckBox::indicator {
+    width: 16px;
+    height: 16px;
+}
+
 LockedCheckBox::indicator:checked,
 LockedCheckBox::indicator:checked:hover {
     image: url(./Dark/locked.svg);
@@ -1111,6 +1120,11 @@ VisibilityCheckBox {
     margin-left: -1px;
 }
 
+VisibilityCheckBox::indicator {
+    width: 16px;
+    height: 16px;
+}
+
 VisibilityCheckBox::indicator:checked,
 VisibilityCheckBox::indicator:checked:hover {
     image: url(./Dark/visible.svg);

UI/forms/OBSBasic.ui

@@ -793,6 +793,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="spacing">
+           <number>1</number>
+          </property>
           <property name="contextMenuPolicy">
            <enum>Qt::CustomContextMenu</enum>
           </property>
@@ -928,6 +931,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="spacing">
+           <number>1</number>
+          </property>
           <property name="contextMenuPolicy">
            <enum>Qt::CustomContextMenu</enum>
           </property>