[m.selection_border] Highlight only text input widgets on focus ()

Merging branch 'm.selection_border'  into 'main'.

See merge request !2140

GUI/styles/Base.stylesheet

@@ -10,12 +10,6 @@
     background-color: palette(base);
 }
 
-/* Highlight border of focused controls with system highlight color. */
-::focus
-{
-    border: 2px solid palette(highlight);
-}
-
 /* ------------------------------------------------------------------------------- */
 QWidget#GroupBoxToggler
 {
@@ -504,6 +498,16 @@ QComboBox
     border-color: rgba(100, 100, 100, 25%);
 }
 
+/* Highlight border of focused controls with system highlight color. */
+QLineEdit::focus,
+QTextEdit::focus,
+QSpinBox::focus,
+QDoubleSpinBox::focus,
+ScientificSpinBox::focus
+{
+    border: 2px solid palette(highlight);
+}
+
 /* ------------------------------------------------------------------------------- */
 QComboBox::drop-down
 {