Merge pull request #1531 from SuslikV/patch-8

UI: Remove scrollbar line controls for Dark theme

UI/data/themes/Dark.qss

@@ -168,6 +168,7 @@ QScrollBar::handle:vertical {
 QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {
     border: none;
     background: none;
+    height: 0px;
 }
 
 QScrollBar::up-arrow:vertical, QScrollBar::down-arrow:vertical, QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical {
@@ -197,6 +198,7 @@ QScrollBar::handle:horizontal {
 QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal {
     border: none;
     background: none;
+    width: 0px;
 }
 
 QScrollBar::left-arrow:horizontal, QScrollBar::right-arrow:horizontal, QScrollBar::add-page:horizontal, QScrollBar::sub-page:horizontal {