[gnome-builder] i18n: change wording to "Switch surface"

[Christian Hergert <chergert src gnome org>]

commit f77b29e403cf7e42d1e199d3d08207472845e000
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jan 22 09:07:01 2019 -0800

    i18n: change wording to "Switch surface"
    
    Related #773

 src/libide/editor/ide-editor-workspace.ui | 2 +-
 src/libide/gui/ide-primary-workspace.ui   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/libide/editor/ide-editor-workspace.ui b/src/libide/editor/ide-editor-workspace.ui
index 160d93c29..6e446d90c 100644
--- a/src/libide/editor/ide-editor-workspace.ui
+++ b/src/libide/editor/ide-editor-workspace.ui
@@ -18,7 +18,7 @@
                  whole surface changing below it. -->
             <property name="transitions-enabled">false</property>
             <property name="has-tooltip">true</property>
-            <property name="tooltip-text" translatable="yes">Change workspace surface</property>
+            <property name="tooltip-text" translatable="yes">Switch surface</property>
           </object>
         </child>
         <child type="right">
diff --git a/src/libide/gui/ide-primary-workspace.ui b/src/libide/gui/ide-primary-workspace.ui
index a374869b0..ccb523157 100644
--- a/src/libide/gui/ide-primary-workspace.ui
+++ b/src/libide/gui/ide-primary-workspace.ui
@@ -18,7 +18,7 @@
                  whole surface changing below it. -->
             <property name="transitions-enabled">false</property>
             <property name="has-tooltip">true</property>
-            <property name="tooltip-text" translatable="yes">Change workspace surface</property>
+            <property name="tooltip-text" translatable="yes">Switch surface</property>
           </object>
         </child>
         <child type="title">