QbsProjectManager: Add a settings category icon

Qbs... Cubes.. 6 cubes that result in a familiar silhouette.
No? Well, IMHO at least better than no icon at all.

Change-Id: I7d3a1824a096f4a083410df53db89eba87ff1b1e
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/qbsprojectmanager/qbsprojectmanager.qrc

@@ -4,5 +4,7 @@
         <file>images/groups@2x.png</file>
         <file>images/productgear.png</file>
         <file>images/productgear@2x.png</file>
+        <file>images/settingscategory_qbsprojectmanager.png</file>
+        <file>images/settingscategory_qbsprojectmanager@2x.png</file>
     </qresource>
 </RCC>

src/plugins/qbsprojectmanager/qbssettings.cpp

@@ -184,6 +184,9 @@ QbsSettingsPage::QbsSettingsPage()
     setCategory(Constants::QBS_SETTINGS_CATEGORY);
     setDisplayCategory(QCoreApplication::translate("QbsProjectManager",
                                                    Constants::QBS_SETTINGS_TR_CATEGORY));
+    setCategoryIcon(
+                Utils::Icon({{":/qbsprojectmanager/images/settingscategory_qbsprojectmanager.png",
+                              Utils::Theme::PanelTextColorDark}}, Utils::Icon::Tint));
 }
 
 QWidget *QbsSettingsPage::widget()

src/tools/icons/qtcreatoricons.svg

@@ -3487,6 +3487,28 @@
          width="100%"
          height="100%" />
     </g>
+    <g
+       id="src/plugins/qbsprojectmanager/images/settingscategory_qbsprojectmanager">
+      <use
+         style="display:inline"
+         transform="translate(1040,64)"
+         height="100%"
+         width="100%"
+         id="use6243"
+         xlink:href="#backgroundRect_24"
+         y="0"
+         x="0" />
+      <path
+         style="fill:#b3b3b3"
+         d="m 1021.5,485.5 h 12 v 8 l 2,-2 v -8 h -12 z"
+         id="path6323"
+         inkscape:connector-curvature="0" />
+      <path
+         id="path6314"
+         style="fill:none;stroke:#000000"
+         d="m 1033.5,485.5 v 8 m -12,-8 h 12 l 2,-2 m -14,2 2,-2 h 12 v 8 l -2,2 h -12 z m 8,8 v -8 l 2,-2 m -6,10 v -8 l 2,-2 m -6,6 h 12 l 2,-2"
+         inkscape:connector-curvature="0" />
+    </g>
     <g
        id="src/plugins/valgrind/images/kcachegrind"
        transform="translate(112)">