logsview: fix logs color in dark mode

The textarea is still white in dark mode, so the text must be black

Change-Id: I6d475cfb920fcd9f3b51e6df01eba4d30a0bc675

src/settingsview/components/LogsView.qml

@@ -239,7 +239,7 @@ Window {
                 font.hintingPreference: Font.PreferNoHinting
 
                 readOnly: true
-                color: JamiTheme.textColor
+                color: JamiTheme.blackColor
                 wrapMode: TextArea.Wrap
                 selectByMouse: true