Noli me tangere OS

maybe you need to import a different version of QtQuick Dialogs? perhaps 2.2?
but like dobey said, I would not suggest using that since its more of a desktop app dialog.
You should just use QtQuick.Controls 2.2

Okay, now they look normal in size

Welcome BIG android emojis

I think UT is "bad" for most people but not for those who doesn't expect much and doesn't intend to use UT like Android/iOS.
In my opinion, there are really bad things that were done in the early days of UT that still affects many part of the OS.
I still believe that UT has a bright future.If that's your perception with UT right now, then I guess you should really just go back to Android. You can always go back later on

That's cool, not sure what's the effort and possible issues, maybe we can officially make the messaging app a click so that it'll be easier to release fixes in the store

Does this mean you were able to create a click package for the messaging app and successfully installed it and working?

It's possible to use ADB but you'd have to install it first via apt which isn't really officially supported.
And I don't think it'll work in libertine.

guru is right, create a hotspot on one of your device and connect the other to it. This way you don't need external wifi connection. Either setup SSH between the two or use WifiTransfer app.

The latest phone that UT supports is I think the Meizu PRO 5 which might be hard to get and there are also some regional versions that could have conflicts with UT.
The best phones might be OPO and Nexus 5 in terms of performance, prices and availability.
If you don't plan to use it as daily driver, I would suggest Nexus 5 because it supports wired external display and you can play with the potential of UT

@xqqy not sure about 1.2 but QtQuick.Controls 2.2 is available in UT