provide livereload 'r' (restart option) to reload from root of app in CLI 3.x

[jasonwinshell-br]

CLI 3.x dropped the hot key command in terminal 'r' to perform the live reload from the root of the app (location.hash = ""). A live reload of the current page, resulting from a change to watched file, can leave the app in an consistent state thus requiring full reload. We need an option to restart the app at the root. I find the loss of this feature to be most problematic for Ionic v1 projects.

Steps to Reproduce:

1. ionic serve | ionic run --lc ios | or any other live reload command
2. navigate into your app so not at root page
3. touch a watched file
4. app reloads at current page (location.hash preserved)

Output:

CLI has no hot key 'r' to restart the from the root URL (location.hash=""). My work around is to type location.hash="" into the browser debugger.

Bumming.

My ionic info:

global packages:

@ionic/cli-plugin-proxy : 1.3.2
@ionic/cli-plugin-proxy : 1.3.2
@ionic/cli-utils        : 1.5.0
Cordova CLI             : 7.0.1 
Gulp CLI                : not installed globally
Ionic CLI               : 3.5.0

local packages:

@ionic/cli-plugin-cordova : 1.4.1
@ionic/cli-plugin-gulp    : 1.0.2
@ionic/cli-plugin-ionic1  : 2.0.1
Cordova Platforms         : android 6.0.0 ios 4.4.0
Ionic Framework           : ionic1 1.3.3

System:

Node       : v7.4.0
OS         : macOS Sierra
Xcode      : Xcode 8.3.3 Build version 8E3004b 
ios-deploy : 1.9.0 
ios-sim    : 5.0.13 
npm        : 4.1.1 

Other Information:

[loban]

This is also useful when running ionic serve from inside a docker container. Due to a limitation of "Docker on Windows" and "Docker on Mac", file-system change events are not propagated through mounted volumes, and so live-reload doesn't automatically work. I need to be able to press "r" (or some other hotkey) to force a reload.

[imhoffd]

We would only be able to do this for Ionic v3, as v4 uses the Angular CLI for serve.