Updating the help text on the form

I updated all the necessary `help_text` arguments on the form. I
performed few changes in the template to have a better rendering such
as:

- add a margin between the form and the sandbox box
- remove the floating button for the submit button (prevent an overflow
  of the footer on top of the button)
- add a "no preset available" text in the drop down menu
Signed-off-by: Matthieu Berjon <matthieu.berjon@inria.fr>

django/allgo/main/forms.py

@@ -99,19 +99,22 @@ class HomeSignupForm(SignupForm):
 class JobForm(forms.ModelForm):
     version = forms.CharField(
             label = 'Version',
-            label_suffix='')
+            label_suffix='',
+            help_text='Version of the application')
     files = forms.FileField(
             widget=forms.FileInput(attrs={'multiple': True}),
             required=False,
             label='Files to upload',
-            label_suffix='')
+            label_suffix='',
+            help_text='Select all the files you want to upload by clicking on "Choose file"')
     queue_id = forms.ModelChoiceField(
             queryset=JobQueue.objects.all().distinct(),
             initial=1,
             label='Queue',
             label_suffix='',
+            help_text=mark_safe('You can refer to the <a href="https://allgo.gitlabpages.inria.fr/doc/deploy.html#queue-type">queue type documentation</a> for further explanation.'),
             )
-    param = forms.CharField(label='Parameters', label_suffix='', required=False)
+    param = forms.CharField(label='Parameters', label_suffix='', required=False, help_text='Enter the parameters you need or click on the "presets" button to select any predefined one.')
     webapp_parameters = forms.ModelChoiceField(
             queryset=WebappParameter.objects.all(),
             label="presets",

django/allgo/templates/webapp_detail.html

@@ -68,7 +68,7 @@
     {% endif %}
 
     {# Panels #}
-    <ul class="nav nav-tabs">
+    <ul class="nav nav-tabs mt-3">
       <li class="nav-item"><a class="nav-link active" data-toggle="tab" href="#create-job"><i class="fas fa-database"></i> Run a job</a></li>
       <li class="nav-item"><a class="nav-link" data-toggle="tab" href="#api"><i class="fas fa-terminal"></i> Use the API</a></li>
       {% if webapp.notebook_gitrepo %}
@@ -86,6 +86,7 @@
             <div class="form-group">
               {{ form.files.label_tag }}
               <input type="file" class="form-control-file filestyle" name="{{ form.files.name }}" id="inputGroupFile01" data-buttonBefore="true" data-badge="true"  multiple>
+              <small class="form-text text-muted">{{ form.files.help_text }}</small>
             </div>
 
             {{ form.param | label_with_classes:"d-block" }}
@@ -96,11 +97,14 @@
                   <div class="dropdown-menu">
                     {% for choice in form.webapp_parameters.field.queryset %}
                       <a class="dropdown-item" href="#" data-param="{{ choice.value }}">{{ choice.name }}</a>
+                    {% empty %}
+                    <p class="dropdown-item">No presets available</p>
                     {% endfor %}
                   </div>
                 </div>
-                {{ form.param | attr:"placeholder:Type your parameters" | add_class:"form-control dropdown-value" }}
+                {{ form.param | attr:"placeholder:Type your parameters here" | add_class:"form-control dropdown-value" }}
               </div>
+              <small class="form-text text-muted">{{ form.param.help_text }}</small>
             </div>
 
             <div class="row">
@@ -111,7 +115,9 @@
                   <option value="{{ choice }}">{{ choice }}</option>
                   {% endfor %}
                 </select>
+                <small class="form-text text-muted">{{ form.version.help_text }}</small>
               </div>
+
               <div class="col form-group">
                 {{ form.queue_id.label_tag }}
 
@@ -122,10 +128,11 @@
                     >{{ choice | fancy_job_queue }}</option>
                   {% endfor %}
                 </select>
+                <small class="form-text text-muted">{{ form.queue_id.help_text }}</small>
               </div>
             </div>
 
-            <input class="btn btn-primary float-right" type="submit" value="Run this job">
+            <input class="btn btn-primary" type="submit" value="Run this job">
         </form>