QmlJsTools: Move category_qml from Core to QmlJsTools

It is qml specific, and only used in qml plugins.

Alsoe, SETTINGS_CATEGORY_QML_ICON was defined in
qmldesignerconstants.h and other plugins included that
header. This contradicts the plugin dependecies
too much.

Change-Id: I76f31cd01bc9c02faf914051cae8bac7d7bac659
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

src/plugins/qmljstools/qmljscodestylesettingspage.cpp

@@ -151,7 +151,7 @@ QmlJSCodeStyleSettingsPage::QmlJSCodeStyleSettingsPage(/*QSharedPointer<CppFileS
     setDisplayName(QCoreApplication::translate("QmlJSTools", Constants::QML_JS_CODE_STYLE_SETTINGS_NAME));
     setCategory(QmlJSEditor::Constants::SETTINGS_CATEGORY_QML);
     setDisplayCategory(QCoreApplication::translate("QmlJSEditor", QmlJSEditor::Constants::SETTINGS_TR_CATEGORY_QML));
-    setCategoryIcon(QLatin1String(QmlDesigner::Constants::SETTINGS_CATEGORY_QML_ICON));
+    setCategoryIcon(QLatin1String(QmlJSTools::Constants::SETTINGS_CATEGORY_QML_ICON));
 }
 
 QWidget *QmlJSCodeStyleSettingsPage::widget()

src/plugins/qmljstools/qmljstools.qrc

@@ -1,5 +1,6 @@
 <RCC>
     <qresource prefix="/qmljstools">
+        <file>images/category_qml.png</file>
         <file>images/prompt.png</file>
         <file>images/collapse.png</file>
         <file>images/warning.png</file>

src/plugins/qmljstools/qmljstoolsconstants.h

@@ -51,6 +51,8 @@ const char QML_JS_SETTINGS_NAME[] = QT_TRANSLATE_NOOP("QmlJSTools", "Qt Quick");
 const char M_TOOLS_QMLJS[] = "QmlJSTools.Tools.Menu";
 const char RESET_CODEMODEL[] = "QmlJSTools.ResetCodeModel";
 
+const char SETTINGS_CATEGORY_QML_ICON[] = ":/qmljstools/images/category_qml.png";
+
 } // namespace Constants
 } // namespace QmlJSTools