Dial Panel refinement

[ifoche]

• [x] Use ionic-icons
• [x] Use col-8 and col-2 in the ionic grid system
• [x] Use @IonicPage on pages
• [x] Add segment/:phoneNumber for CallingPage
• [x] Remove hard coded terms and start using the multilingual framework.

[jordibc]

Development happening in branch fixes/dial-panel.

[jordibc]

We used to have this requirement too:

• [ ] Restart tabs state after call selection (go back to Call Page) But we will do it in another card, as it turns out to be trickier than the rest.