[gnome-system-monitor] Removed leftover colons (fixes #189)

[Robert Roth <robertroth src gnome org>]

commit 4bbbe6868aad7995e793449f20f8f9c9ac2cb1f1
Author: Robert Roth <robert roth off gmail com>
Date:   Tue Apr 6 07:51:26 2021 +0300

    Removed leftover colons (fixes #189)

 data/preferences.ui | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/data/preferences.ui b/data/preferences.ui
index 098f8e52..6e7256a5 100644
--- a/data/preferences.ui
+++ b/data/preferences.ui
@@ -139,7 +139,7 @@
               <object class="HdyActionRow">
                 <property name="visible">True</property>
                 <property name="use-underline">True</property>
-                <property name="title" translatable="yes">_Update Interval in Seconds:</property>
+                <property name="title" translatable="yes">_Update Interval in Seconds</property>
                 <property name="activatable-widget">resources_interval_spinner</property>
                 <child>
                   <object class="GtkSpinButton" id="resources_interval_spinner">
@@ -157,7 +157,7 @@
               <object class="HdyActionRow">
                 <property name="visible">True</property>
                 <property name="use-underline">True</property>
-                <property name="title" translatable="yes">_Chart Data Points:</property>
+                <property name="title" translatable="yes">_Chart Data Points</property>
                 <child>
                   <object class="GtkScale" id="graph_data_points_scale">
                     <property name="hexpand">True</property>
@@ -336,7 +336,7 @@
           <object class="HdyPreferencesGroup">
             <property name="visible">True</property>
             <property name="title" translatable="yes">Information Fields</property>
-            <property name="description" translatable="yes">File system information shown in list:</property>
+            <property name="description" translatable="yes">File system information shown in list</property>
             <child>
               <object class="GtkFrame">
                 <property name="visible">True</property>