Fix: prevent deletion of loaded profile (Mudlet#7436)

#### Brief overview of PR changes/additions
Using the same code execution that puts up the warning about a profile
being used not being editable (in some ways) to also disable the
"Remove" button.

#### Motivation for adding to Mudlet
It has already been proven to break things!

#### Other info (issues closed, discussion etc)
This should close Mudlet#2225 - and give me a $20 bounty!

This was originally built on top of Mudlet#7428 - but it was rebased onto
`development` - and neither PR is affected by the other one.

---------

Signed-off-by: Stephen Lyons <[email protected]>
Co-authored-by: Vadim Peretokin <[email protected]>

src/dlgConnectionProfiles.cpp

@@ -945,6 +945,9 @@ void dlgConnectionProfiles::slot_itemClicked(QListWidgetItem* pItem)
     const QString profileLoadedMessage = tr("This profile is currently loaded - close it before changing the connection parameters.");
 
     if (mudlet::self()->getHostManager().getHost(profile_name)) {
+        remove_profile_button->setEnabled(false);
+        remove_profile_button->setToolTip(utils::richText(tr("A profile that is in use cannot be removed")));
+
         profile_name_entry->setReadOnly(true);
         host_name_entry->setReadOnly(true);
         port_entry->setReadOnly(true);
@@ -979,6 +982,8 @@ void dlgConnectionProfiles::slot_itemClicked(QListWidgetItem* pItem)
         if (notificationAreaMessageBox->text() == profileLoadedMessage) {
             clearNotificationArea();
         }
+        remove_profile_button->setEnabled(true);
+        remove_profile_button->setToolTip(QString());
     }
 }