Dark style: add QTableCornerButton. Fix padding for tables.

CodeDiffDialog: Fix QTableWidget UI issues

Source/Core/DolphinQt/Debugger/CodeDiffDialog.cpp

@@ -61,7 +61,7 @@ void CodeDiffDialog::CreateWidgets()
   m_record_btn = new QPushButton(tr("Start Recording"));
   m_record_btn->setCheckable(true);
   m_record_btn->setStyleSheet(RECORD_BUTTON_STYLESHEET);
-
+  m_record_btn->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
   m_exclude_btn->setEnabled(false);
   m_include_btn->setEnabled(false);
 
@@ -89,6 +89,7 @@ void CodeDiffDialog::CreateWidgets()
   m_matching_results_table->setColumnWidth(2, 4);
   m_matching_results_table->setColumnWidth(3, 210);
   m_matching_results_table->setColumnWidth(4, 65);
+  m_matching_results_table->setCornerButtonEnabled(false);
   m_reset_btn = new QPushButton(tr("Reset All"));
   m_reset_btn->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
   m_help_btn = new QPushButton(tr("Help"));

Source/Core/DolphinQt/Styles/Dark/dark.qss

@@ -82,19 +82,20 @@ QColumnView::item:focus, QListView::item:focus, QTableView::item:focus, QTableWi
 	background-color: #606060;
 }
 */
+
+/*
+Qt is extremely convinced that the sort arrow belongs on the right side
+of the header and will reserve space for it there. The padding is to deal with this fact.
+*/
 QHeaderView::section {
 	background-color: #202020;
 	border: 0px;
 	border-right: 1px solid #7e7e7e;
-	padding: 0px;
-	text-align: right;
-
-	/*
-	this is a hack, Qt is extremely convinced that the sort arrow belongs on the right side
-	of the header and will reserve space for it there. so this applies that same space to the left
-	so the text is still centered correctly.
-	*/
+	padding-right: -10px;
+}
+QHeaderView::section::vertical { 
 	padding-left: 10px;
+	padding-right: 0px;
 }
 QHeaderView::section:last {
 	border-right: 0px;
@@ -485,3 +486,10 @@ QTabBar QToolButton::left-arrow {
 QTabBar QToolButton::right-arrow {
 	image: url(:/dolphin_dark_win/right-triangle-tabbar.svg);
 }
+QTableCornerButton::section {
+    background-color: #202020;
+    border: 1px solid #7e7e7e;
+    border-top: 0px;
+    border-left: 0px;
+    border-bottom: 0px;
+}