[IMP] im_livechat: move input_placeholder

In order for the user to understand what the chat_input_placeholder
field means we should add a tooltip.
We should reorganize the fields in order to put them in logical order.

This commit is related to task 1837812.
Closes #24336

addons/im_livechat/models/im_livechat_channel.py

@@ -30,7 +30,7 @@ class ImLivechatChannel(models.Model):
         help="Default text displayed on the Livechat Support Button")
     default_message = fields.Char('Welcome Message', default='How may I help you?',
         help="This is an automated 'welcome' message that your visitor will see when they initiate a new conversation.")
-    input_placeholder = fields.Char('Chat Input Placeholder')
+    input_placeholder = fields.Char('Chat Input Placeholder', help='Text that prompts the user to initiate the chat.')
 
     # computed fields
     web_page = fields.Char('Web Page', compute='_compute_web_page_link', store=False, readonly=True,

addons/im_livechat/views/im_livechat_channel_views.xml

@@ -124,8 +124,8 @@
                         </group>
                         <group string="Options">
                             <field name="button_text"/>
-                            <field name="input_placeholder"/>
                             <field name="default_message" placeholder="e.g. Hello, how may I help you?"/>
+                            <field name="input_placeholder"/>
                         </group>
                     </group>