Adds a couple of usability tweaks to the dropdown cell type in the data table widget, to more closely mimic a native dropdown field.
Pressing the up or down arrow keys when the cell is focused but with the dropdown closed will select the previous or next item automatically and set it as the cell value. This does prevent the usual table function of going to the previous or next row when focused on a dropdown cell, but I think it's a worthwhile trade-off. When the dropdown is open, the up and down arrows work the same as previously implemented.
Typing out characters will initiate a search and select the first matching option automatically and set it as the cell value. For example, for the following options:
Apples
Oranges
Bananas
Typing out o and r on the keyboard will automatically select the Oranges option.
Credit to @bennothommo
Credit to @tobias-kuendig. Added $.oc.relationBehavior.changed function. To keep track of changes made using the relation controller this new "changed" function is called every time a record is created, added, removed or deleted. The function triggers the change.oc.formwidget event on the form field that belongs to this relation controller so other form fields are notified about the changes.
This is needed as it removes leftover control-popover backdrops in any plugin backend that utilizes ajax in a popup modal (which is any of them that has relations or nested relations), so we will need to take a look at the dashboard widgets again. Credit to @ayumihamsaki.
Credit to @Farrow. Previously when creating a backend form with RainLab.Builder if you filled in the "Default" property using the i18n (to get, for example, acme.plugin::lang.field.default) then that string would be output exactly on the form (i.e. <input value="acme.plugin::lang.field.default"...>) instead of being replaced with the actual value of that key from the lang file.
Credit to @vosco88.
When trying to deploy October on shared hosting (www.websupport.sk) it is possible to receive the following error when accessing the frontend pages - ErrorException:> Zend OPcache API is restricted by "restrict_api" configuration directive. This checks not only if the opcache_invalidate exists but also if opcache is enabled. Same check is actually present in twig vendor files - but so far it is working without having the check there.
This commit adds two new aliases for the files associated with `framework.extras`. One to load the CSS (`framework.extras.css`) and for JS (`framework.extras.js`). Credit to @CptMeatball. Resolves#3909. Related: https://github.com/octobercms/docs/pull/334
