style: change background color to match system (#243)

* change background color to match system

* news

* Comply with dataset config panels

* remove comment

Author: cadenmyers13

news/textbox-color.rst

@@ -0,0 +1,23 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* Change background color to match system settings in `Phase Configuration`.
+
+**Security:**
+
+* <news item>

src/diffpy/pdfgui/gui/phaseconfigurepanel.py

@@ -321,6 +321,7 @@ def restrictConstrainedParameters(self):
 
         self.setToolTips(tooltips.phasepanel)
         self.textCtrlA.DefaultStyle.BackgroundColour
+        txtbg = self.textCtrlScaleFactor.DefaultStyle.BackgroundColour
 
         # First the TextCtrls
         for key, var in self.lConstraintsMap.items():
@@ -332,8 +333,7 @@ def restrictConstrainedParameters(self):
                 tt.SetTip(self.constraints[var].formula)
             else:
                 textCtrl.SetEditable(True)
-                # textCtrl.SetBackgroundColour(txtbg)
-                textCtrl.SetBackgroundColour(wx.WHITE)
+                textCtrl.SetBackgroundColour(txtbg)
 
         # Now the grid
         rows = self.gridAtoms.GetNumberRows()