#234 | Reduce editGroupBox and analysisBox minimum heights (160→100, 180→120 px)

Tighter spacing and margins in the Statistics Panel grid (setSpacing(3), setContentsMargins(4,4,4,4))
Shrink miniChart height (140→100 px); replace oversized MinimumExpanding spacer with a slim Preferred one
Set m_tableWidget->setMinimumHeight(80) so the table dock can't collapse to zero
Fix tab-switching logic in slotCacheSelection / slotEditNodeEditSelectionInTable: only switch to Edges tab when the selection is entirely edges (no nodes)
Move GraphTableWidget compact button/search QSS from inline setStyleSheet() into default.qss under the GraphTableWidget selector

Author: oxy86

src/qss/default.qss

@@ -363,6 +363,7 @@ QComboBox:disabled {
 QGroupBox#leftPanel QComboBox {
     min-width: 120px;
     max-width: 120px;
+    min-height: 22px;
 }
 
 QComboBox::drop-down {
@@ -741,3 +742,22 @@ FilterBarWidget QPushButton#ClearAllButton:hover {
     background-color: #c5cae9;
     border-color: #5c6bc0;
 }
+
+
+/* -----------------------------------------------------------------------
+ * Data Table toolbar (#228)
+ * Compact button and search-box appearance inside GraphTableWidget so the
+ * toolbar row stays slim while the global QPushButton style (padding 5px 16px,
+ * min-width 100px) is left untouched everywhere else.
+ * ----------------------------------------------------------------------- */
+
+GraphTableWidget QPushButton {
+    padding: 1px 5px;
+    min-width: 0;
+    font-size: 11px;
+}
+
+GraphTableWidget QLineEdit {
+    font-size: 11px;
+    min-height: 0;
+}

src/widgets/graphtablewidget.cpp

@@ -47,12 +47,6 @@ GraphTableWidget::GraphTableWidget(QWidget *parent)
 {
     setObjectName("GraphTableWidget");
 
-    // Compact button/search styling — reduces toolbar height
-    setStyleSheet(
-        "QPushButton { padding: 1px 5px; font-size: 11px; }"
-        "QLineEdit   { font-size: 11px; }"
-        "QComboBox   { font-size: 11px; }"
-    );
 
     // -----------------------------------------------------------------------
     // Create models