[gnome-builder] Fix spacing in toolchain popover

[Christian Hergert <chergert src gnome org>]

commit 37948459a8cbb7d983c5419d471a3b3455c380b0
Author: Ricardo Silva Veloso <ricvelozo gmail com>
Date:   Tue Jan 14 23:36:26 2020 -0300

    Fix spacing in toolchain popover

 src/plugins/meson/gbp-meson-toolchain-edition-preferences-row.ui | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/src/plugins/meson/gbp-meson-toolchain-edition-preferences-row.ui 
b/src/plugins/meson/gbp-meson-toolchain-edition-preferences-row.ui
index 35645158c..6369f0b7e 100644
--- a/src/plugins/meson/gbp-meson-toolchain-edition-preferences-row.ui
+++ b/src/plugins/meson/gbp-meson-toolchain-edition-preferences-row.ui
@@ -158,9 +158,7 @@
           <object class="GtkGrid">
             <property name="visible">true</property>
             <property name="can_focus">false</property>
-            <style>
-              <class name="linked"/>
-            </style>
+            <property name="column-spacing">12</property>
             <child>
               <object class="GtkComboBoxText" id="tool_combobox">
                 <property name="width_request">150</property>
@@ -208,6 +206,7 @@
             <property name="visible">true</property>
             <property name="can_focus">false</property>
             <property name="orientation">horizontal</property>
+            <property name="column-spacing">12</property>
             <child>
               <object class="DzlFileChooserEntry" id="path_entry">
                 <property name="visible">true</property>