[gnome-calculator] Use sane required width for history view (bgo#788395)

[Robert Roth <robertroth src gnome org>]

commit db86df0307a86adf26d35b6e01c18c17c48945cd
Author: Robert Roth <robert roth off gmail com>
Date:   Wed Jan 24 00:10:57 2018 +0200

    Use sane required width for history view (bgo#788395)

 src/history-view.ui |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/history-view.ui b/src/history-view.ui
index 18008b3..c7f0d63 100644
--- a/src/history-view.ui
+++ b/src/history-view.ui
@@ -7,6 +7,7 @@
     <property name="visible">True</property>
     <property name="can_focus">True</property>
     <property name="vexpand">True</property>
+    <property name="width_request">350</property>
     <property name="hscrollbar_policy">never</property>
     <property name="shadow_type">etched-out</property>
     <signal name="row_added" handler="scroll_bottom" swapped="no"/>