LibGUI: Increase row height in Table/ColumnViews and center icons

16x16 icons are now guaranteed at least 1px margins between rows

Userland/Libraries/LibGUI/AbstractTableView.cpp

@@ -87,7 +87,7 @@ void AbstractTableView::update_column_sizes()
             auto cell_data = model.index(row, column).data();
             int cell_width = 0;
             if (cell_data.is_icon()) {
-                cell_width = row_height();
+                cell_width = cell_data.as_icon().bitmap_for_size(16)->width();
             } else if (cell_data.is_bitmap()) {
                 cell_width = cell_data.as_bitmap().width();
             } else if (cell_data.is_valid()) {
@@ -399,7 +399,7 @@ int AbstractTableView::horizontal_padding() const
 
 int AbstractTableView::row_height() const
 {
-    return font().glyph_height() + 6;
+    return font().glyph_height() + icon_padding();
 }
 
 }

Userland/Libraries/LibGUI/AbstractTableView.h

@@ -60,6 +60,7 @@ public:
     void set_column_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate>);
 
     int horizontal_padding() const;
+    int icon_padding() const { return 8; }
 
     Gfx::IntPoint adjusted_position(const Gfx::IntPoint&) const;
 

Userland/Libraries/LibGUI/ColumnsView.h

@@ -46,7 +46,7 @@ private:
     void push_column(const ModelIndex& parent_index);
     void update_column_sizes();
 
-    int item_height() const { return 16; }
+    int item_height() const { return 18; }
     int icon_size() const { return 16; }
     int icon_spacing() const { return 2; }
     int text_padding() const { return 2; }

Userland/Libraries/LibGUI/TableView.cpp

@@ -125,6 +125,7 @@ void TableView::paint_event(PaintEvent& event)
                     painter.blit(cell_rect.location(), data.as_bitmap(), data.as_bitmap().rect());
                 } else if (data.is_icon()) {
                     if (auto bitmap = data.as_icon().bitmap_for_size(16)) {
+                        cell_rect.set_y(cell_rect.y() + (row_height() - bitmap->height()) / 2);
                         if (is_selected_row) {
                             auto tint = selection_color.with_alpha(100);
                             painter.blit_filtered(cell_rect.location(), *bitmap, bitmap->rect(), [&](auto src) { return src.blend(tint); });