Adding button ids to change them out while downloading

src/ui/results.ui

@@ -90,14 +90,15 @@
                     <child>
                       <object class="GtkButton" id="audio_dl">
                         <property name="visible">True</property>
+                        <property name="sensitive">False</property>
                         <property name="can-focus">True</property>
                         <property name="receives-default">True</property>
-                        <property name="tooltip-text" translatable="yes">Download Audio</property>
+                        <property name="tooltip-text" translatable="yes">Save Audio</property>
                         <property name="halign">center</property>
                         <property name="valign">center</property>
                         <signal name="clicked" handler="audio_dl_button" swapped="no"/>
                         <child>
-                          <object class="GtkImage">
+                          <object class="GtkImage" id="audio_dl_image">
                             <property name="visible">True</property>
                             <property name="can-focus">False</property>
                             <property name="icon-name">emblem-music-symbolic</property>
@@ -116,14 +117,15 @@
                     <child>
                       <object class="GtkButton" id="video_dl">
                         <property name="visible">True</property>
+                        <property name="sensitive">False</property>
                         <property name="can-focus">True</property>
                         <property name="receives-default">True</property>
-                        <property name="tooltip-text" translatable="yes">Download Video</property>
+                        <property name="tooltip-text" translatable="yes">Save Video</property>
                         <property name="halign">center</property>
                         <property name="valign">center</property>
                         <signal name="clicked" handler="video_dl_button" swapped="no"/>
                         <child>
-                          <object class="GtkImage">
+                          <object class="GtkImage" id="video_dl_image">
                             <property name="visible">True</property>
                             <property name="can-focus">False</property>
                             <property name="icon-name">emblem-videos-symbolic</property>
@@ -231,6 +233,7 @@
                     <child>
                       <object class="GtkButton" id="speed">
                         <property name="visible">True</property>
+                        <property name="sensitive">False</property>
                         <property name="can-focus">True</property>
                         <property name="receives-default">True</property>
                         <property name="tooltip-text" translatable="yes">Adjust Speed</property>