LibGUI: Rename table view's "cell painting delegate" to "column *"

What you install with this API is a delegate that manages painting of
all the items in a specific column, so let's make the API reflect that.

Applications/Spreadsheet/SpreadsheetView.cpp

@@ -62,7 +62,7 @@ SpreadsheetView::SpreadsheetView(Sheet& sheet)
 
     // FIXME: This is dumb.
     for (size_t i = 0; i < m_sheet->column_count(); ++i) {
-        m_table_view->set_cell_painting_delegate(i + 1, make<TableCellPainter>(*m_table_view));
+        m_table_view->set_column_painting_delegate(i + 1, make<TableCellPainter>(*m_table_view));
         m_table_view->set_column_width(i + 1, 50);
         m_table_view->set_column_header_alignment(i + 1, Gfx::TextAlignment::Center);
     }

Applications/SystemMonitor/ProcessMemoryMapWidget.cpp

@@ -118,7 +118,7 @@ ProcessMemoryMapWidget::ProcessMemoryMapWidget()
     m_json_model = GUI::JsonArrayModel::create({}, move(pid_vm_fields));
     m_table_view->set_model(GUI::SortingProxyModel::create(*m_json_model));
 
-    m_table_view->set_cell_painting_delegate(7, make<PagemapPaintingDelegate>());
+    m_table_view->set_column_painting_delegate(7, make<PagemapPaintingDelegate>());
 
     m_table_view->set_key_column_and_sort_order(0, GUI::SortOrder::Ascending);
     m_timer = add<Core::Timer>(1000, [this] { refresh(); });

Applications/SystemMonitor/main.cpp

@@ -443,7 +443,7 @@ NonnullRefPtr<GUI::Widget> build_file_systems_tab()
         df_fields.empend("block_size", "Block size", Gfx::TextAlignment::CenterRight);
         fs_table_view.set_model(GUI::SortingProxyModel::create(GUI::JsonArrayModel::create("/proc/df", move(df_fields))));
 
-        fs_table_view.set_cell_painting_delegate(3, make<ProgressBarPaintingDelegate>());
+        fs_table_view.set_column_painting_delegate(3, make<ProgressBarPaintingDelegate>());
 
         fs_table_view.model()->update();
     };

Libraries/LibGUI/AbstractTableView.cpp

@@ -115,7 +115,7 @@ TableCellPaintingDelegate* AbstractTableView::column_painting_delegate(int colum
     return const_cast<TableCellPaintingDelegate*>(m_column_painting_delegate.get(column).value_or(nullptr));
 }
 
-void AbstractTableView::set_cell_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate> delegate)
+void AbstractTableView::set_column_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate> delegate)
 {
     if (!delegate)
         m_column_painting_delegate.remove(column);

Libraries/LibGUI/AbstractTableView.h

@@ -57,7 +57,7 @@ public:
     Gfx::TextAlignment column_header_alignment(int column) const;
     void set_column_header_alignment(int column, Gfx::TextAlignment);
 
-    void set_cell_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate>);
+    void set_column_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate>);
 
     int horizontal_padding() const { return m_horizontal_padding; }