add buttons to load/save table display setting

Author: ccbogel

src/GUI_UIs/ui_dialog_manage_files.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>794</width>
+    <width>805</width>
     <height>538</height>
    </rect>
   </property>
@@ -84,7 +84,7 @@ Text files (from any source) are exported from the text stored in the database a
      <widget class="QPushButton" name="pushButton_delete">
       <property name="geometry">
        <rect>
-        <x>590</x>
+        <x>670</x>
         <y>3</y>
         <width>30</width>
         <height>30</height>
@@ -245,7 +245,7 @@ Cannot export text transcription file associated with an audio or video as a lin
      <widget class="QPushButton" name="pushButton_bulk_rename">
       <property name="geometry">
        <rect>
-        <x>630</x>
+        <x>700</x>
         <y>3</y>
         <width>30</width>
         <height>30</height>
@@ -258,6 +258,38 @@ Cannot export text transcription file associated with an audio or video as a lin
        <string/>
       </property>
      </widget>
+     <widget class="QPushButton" name="pushButton_display_save">
+      <property name="geometry">
+       <rect>
+        <x>610</x>
+        <y>3</y>
+        <width>30</width>
+        <height>30</height>
+       </rect>
+      </property>
+      <property name="toolTip">
+       <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Save table display settings. &lt;/p&gt;&lt;p&gt;(Hidden rows and columns and column sizing)&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+      </property>
+      <property name="text">
+       <string/>
+      </property>
+     </widget>
+     <widget class="QPushButton" name="pushButton_display_load">
+      <property name="geometry">
+       <rect>
+        <x>580</x>
+        <y>3</y>
+        <width>30</width>
+        <height>30</height>
+       </rect>
+      </property>
+      <property name="toolTip">
+       <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Load saved table display setting.&lt;/p&gt;&lt;p&gt;(Hidden rows and columns and column sizing)&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+      </property>
+      <property name="text">
+       <string/>
+      </property>
+     </widget>
     </widget>
    </item>
    <item row="3" column="0">