Better positioning of the plus sign icons in the Equip. tab

There are a couple of problems with said icons:
- When the Equip. tab is first seen, no relative event is monitored
so that the correct position is updated and the icons are positioned.

To solve that we connect the signal MainTab::currentChanged(int)
and call MainTab::equipmentPlusUpdate().

- When the info-profile QSplitter resizes with a snap towards/from
the edges of the main window, no resize handler is called such as
MainTab::resizeEvent().

A solution is to monitor the resize of the info-profile splitter
with MainWindow::on_infoProfileSplitter_splitterMoved() and again
call MainTab::equipmentPlusUpdate()

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/maintab.h

@@ -43,6 +43,7 @@ public:
     virtual void hideEvent(QHideEvent* );
 
 	void initialUiSetup();
+	void equipmentPlusUpdate();
 
 
 public slots:
@@ -58,6 +59,7 @@ public slots:
 	void on_notes_textChanged();
 	void on_rating_valueChanged(int value);
 	void on_visibility_valueChanged(int value);
+	void tabChanged(int idx);
 
 private:
 	Ui::MainTab *ui;