Utils: Enhance resize shrinking behavior of the AbiWidget

Allow the first combobox to shrink below the length of the displayed
text: That information is repeated in the details anyway.

Change-Id: Iadb554cbd08a4a9a0a0d8060cbbedc8cdacb791a
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>

src/plugins/projectexplorer/abiwidget.cpp

@@ -82,6 +82,8 @@ AbiWidget::AbiWidget(QWidget *parent) :
     layout->setSpacing(2);
 
     d->m_abi = new QComboBox(this);
+    d->m_abi->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLengthWithIcon);
+    d->m_abi->setMinimumContentsLength(4);
     layout->addWidget(d->m_abi);
     connect(d->m_abi, SIGNAL(currentIndexChanged(int)), this, SLOT(modeChanged()));