include more icons link to Howto doc

tools/lammps-gui/lammpsgui.cpp

@@ -156,6 +156,7 @@ LammpsGui::LammpsGui(QWidget *parent, const char *filename) :
     connect(ui->actionImage, &QAction::triggered, this, &LammpsGui::render_image);
     connect(ui->actionAbout_LAMMPS_GUI, &QAction::triggered, this, &LammpsGui::about);
     connect(ui->action_Help, &QAction::triggered, this, &LammpsGui::help);
+    connect(ui->actionLAMMPS_GUI_Howto, &QAction::triggered, this, &LammpsGui::howto);
     connect(ui->actionLAMMPS_Manual, &QAction::triggered, this, &LammpsGui::manual);
     connect(ui->actionPreferences, &QAction::triggered, this, &LammpsGui::preferences);
     connect(ui->actionDefaults, &QAction::triggered, this, &LammpsGui::defaults);
@@ -895,6 +896,11 @@ void LammpsGui::manual()
     QDesktopServices::openUrl(QUrl("https://docs.lammps.org/"));
 }
 
+void LammpsGui::howto()
+{
+    QDesktopServices::openUrl(QUrl("https://docs.lammps.org/Howto_lammps_gui.html"));
+}
+
 void LammpsGui::defaults()
 {
     QSettings settings;

tools/lammps-gui/lammpsgui.h

@@ -85,6 +85,7 @@ private slots:
     void about();
     void help();
     void manual();
+    void howto();
     void logupdate();
     void modified();
     void preferences();

tools/lammps-gui/lammpsgui.qrc

@@ -1,38 +1,20 @@
-<!DOCTYPE RCC><RCC version="1.0">
+<RCC>
     <qresource prefix="/">
         <file>lammps-icon-128x128.png</file>
-</qresource>
-<qresource prefix="/">
         <file>help_index.table</file>
-</qresource>
-<qresource prefix="/">
         <file>system-help.png</file>
-</qresource>
-<qresource prefix="/">
         <file>help-browser.png</file>
-</qresource>
-<qresource prefix="/">
         <file>gtk-zoom-in.png</file>
-</qresource>
-<qresource prefix="/">
         <file>gtk-zoom-out.png</file>
-</qresource>
-<qresource prefix="/">
         <file>gtk-zoom-fit.png</file>
-</qresource>
-<qresource prefix="/">
         <file>edit-delete.png</file>
-</qresource>
-<qresource prefix="/">
         <file>object-rotate-right.png</file>
-</qresource>
-<qresource prefix="/">
         <file>object-rotate-left.png</file>
-</qresource>
-<qresource prefix="/">
         <file>gtk-go-up.png</file>
-</qresource>
-<qresource prefix="/">
         <file>gtk-go-down.png</file>
+        <file>document-save-as.png</file>
+        <file>document-open-recent.png</file>
+        <file>document-open.png</file>
+        <file>document-new.png</file>
     </qresource>
 </RCC>

tools/lammps-gui/lammpsgui.ui

@@ -80,6 +80,7 @@
     </property>
     <addaction name="actionAbout_LAMMPS_GUI"/>
     <addaction name="action_Help"/>
+    <addaction name="actionLAMMPS_GUI_Howto"/>
     <addaction name="actionLAMMPS_Manual"/>
    </widget>
    <widget class="QMenu" name="menu_View">
@@ -395,26 +396,42 @@
    </property>
   </action>
   <action name="action_1">
+   <property name="icon">
+    <iconset theme=":/document-open-recent.png"/>
+   </property>
    <property name="text">
     <string>&amp;1.</string>
    </property>
   </action>
   <action name="action_2">
+   <property name="icon">
+    <iconset theme=":/document-open-recent.png"/>
+   </property>
    <property name="text">
     <string>&amp;2.</string>
    </property>
   </action>
   <action name="action_3">
+   <property name="icon">
+    <iconset theme=":/document-open-recent.png"/>
+   </property>
    <property name="text">
     <string>&amp;3.</string>
    </property>
   </action>
   <action name="action_4">
+   <property name="icon">
+    <iconset theme=":/document-open-recent.png"/>
+   </property>
    <property name="text">
     <string>&amp;4.</string>
    </property>
   </action>
   <action name="action_5">
+   <property name="icon">
+    <iconset>
+            <normaloff>:/document-open-recent.png</normaloff>:/document-open-recent.png</iconset>
+   </property>
    <property name="text">
     <string>&amp;5.</string>
    </property>
@@ -443,6 +460,18 @@
     <string>Ctrl+Shift+V</string>
    </property>
   </action>
+  <action name="actionLAMMPS_GUI_Howto">
+   <property name="icon">
+    <iconset>
+     <normaloff>:/system-help.png</normaloff>:/system-help.png</iconset>
+   </property>
+   <property name="text">
+    <string>LAMMPS GUI Howto</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Shift+G</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>