Always show live key, reword key labels

This is trying to resolve these confusions:

- that you’re in trial mode, which means you can’t have a live key yet (
  or you can but it wont work, which is what we used to have)
- what does simulate mean

The create key page is the right place to resolve these confusions
because it’s where users are actively reading.

This commit also removes the trial mode banner from API integration
page because this where users _aren’t_ actively reading. A whole bunch
of users weren’t seeing this banner at all.

The implementation of the disabled API key options is kinda clunky
because WTForms doesn’t have a native way of doing this.

¯\_(ツ)_/¯

app/main/views/api_keys.py

@@ -1,4 +1,4 @@
-from flask import request, render_template, redirect, url_for, flash
+from flask import request, render_template, redirect, url_for, flash, Markup, abort
 from flask_login import login_required
 from app.main import main
 from app.main.forms import CreateKeyForm, Whitelist
@@ -68,13 +68,22 @@ def create_api_key(service_id):
         key['name'] for key in api_key_api_client.get_api_keys(service_id=service_id)['apiKeys']
     ]
     form = CreateKeyForm(key_names)
-    form.key_type.choices = filter(None, [
-        (KEY_TYPE_NORMAL, 'Send messages to anyone')
-        if not current_service['restricted'] else None,
-        (KEY_TYPE_TEST, 'Simulate sending messages to anyone'),
-        (KEY_TYPE_TEAM, 'Only send messages to your team or whitelist')
-    ])
+    form.key_type.choices = [
+        (KEY_TYPE_NORMAL, 'Send messages to anyone'),
+        (KEY_TYPE_TEAM, 'Send messages to anyone on my whitelist'),
+        (KEY_TYPE_TEST, 'Pretend to send messages to anyone'),
+    ]
+    if current_service['restricted']:
+        disabled_options = [KEY_TYPE_NORMAL]
+        option_hints = {KEY_TYPE_NORMAL: Markup(
+            'This option is not available because your service is in '
+            '<a href="{}">trial mode</a>'.format(url_for(".trial_mode"))
+        )}
+    else:
+        disabled_options, option_hints = [], {}
     if form.validate_on_submit():
+        if form.key_type.data in disabled_options:
+            abort(400)
         secret = api_key_api_client.create_api_key(
             service_id=service_id,
             key_name=form.key_name.data,
@@ -88,7 +97,9 @@ def create_api_key(service_id):
         )
     return render_template(
         'views/api/keys/create.html',
-        form=form
+        form=form,
+        disabled_options=disabled_options,
+        option_hints=option_hints
     )