tdf#117348: Change default grid color to a darker gray

For Impress and Draw

Change-Id: I8c7854062ae061ba2f7cd968ffd608b8d9b0ca5b
Reviewed-on: https://gerrit.libreoffice.org/62025
Tested-by: Jenkins
Reviewed-by: V Stuart Foote <vstuart.foote@utsa.edu>
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>

svtools/source/config/colorcfg.cxx

@@ -439,7 +439,7 @@ Color ColorConfig::GetDefaultColor(ColorConfigEntry eEntry)
         COL_GREEN, // CALCFORMULA
         COL_BLACK, // CALCTEXT
         COL_LIGHTGRAY, // CALCPROTECTEDBACKGROUND
-        COL_LIGHTGRAY, // DRAWGRID
+        COL_GRAY7, // DRAWGRID
         COL_GREEN, // BASICIDENTIFIER,
         COL_GRAY, // BASICCOMMENT,
         COL_LIGHTRED, // BASICNUMBER,