provide select/deselect all buttons in exportdlg

app/settings/dialogs/exporttemplatedialog.ui

@@ -35,17 +35,91 @@
      <item>
       <layout class="QVBoxLayout" name="verticalLayout_2">
        <item>
-        <widget class="QLabel" name="label">
+        <widget class="QTableView" name="appletsTable"/>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_2">
+         <item>
+          <spacer name="horizontalSpacer_3">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="QPushButton" name="selectAllBtn">
+           <property name="text">
+            <string>Select All</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QPushButton" name="deselectAllBtn">
+           <property name="text">
+            <string>Deselect All</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout">
+         <item>
+          <widget class="QLabel" name="locationLbl">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="text">
+            <string notr="true">&lt;b&gt;Location:&lt;/b&gt; ~/.config/latte/layouts/.....</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QPushButton" name="chooseBtn">
+           <property name="text">
+            <string>Choose...</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <widget class="QLabel" name="noteLbl">
          <property name="text">
           <string>&lt;b&gt;Select only&lt;/b&gt; applets that you would like to keep their settings in the extracted template. Make sure to not include any applets that contain personal data such as email credentials, calendar etc. </string>
          </property>
+         <property name="alignment">
+          <set>Qt::AlignJustify|Qt::AlignVCenter</set>
+         </property>
          <property name="wordWrap">
           <bool>true</bool>
          </property>
         </widget>
        </item>
        <item>
-        <widget class="QTableView" name="appletsTable"/>
+        <spacer name="verticalSpacer">
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+         <property name="sizeType">
+          <enum>QSizePolicy::Fixed</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>20</width>
+           <height>5</height>
+          </size>
+         </property>
+        </spacer>
        </item>
       </layout>
      </item>
@@ -73,7 +147,7 @@
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="standardButtons">
-      <set>QDialogButtonBox::Cancel</set>
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Reset</set>
      </property>
     </widget>
    </item>