Feature/ios support

See merge request clients/cesium-grp/cesium!568

tweak translations and some missing strings

See merge request clients/cesium-grp/cesium!564

Update locale-es-ES.json

See merge request clients/cesium-grp/cesium!565

[fix] Graph account balance > change time scale

See merge request clients/cesium-grp/cesium!569

[enh] Ask confirmation before switching to fullscreen, on mobile web browser

[enh] Ask confirmation before switching to fullscreen, on mobile web browser

[fix] Android: Avoid error in the Cesium+ settings page, because of HTML5 Notifications

[fix] Tablet: fix popup layout, when keyboard open in landscape mode - fix #829
[fix] Tablet: add missing padding (list result, etc.)
[fix] Popover: fix freeze after open a popover
[fix] Transfer modal: open then close modal can freeze the app
[fix] Grapĥ: use independant legend option (e.g. scale on a graph are no more linked)
[fix] Fix theme color, in meta tags and manifest.json
[enh] Auto enable fullscreen on small screen, and add a button to toggle

[fix] Join wizard: Always show bottom buttons, on the license modal, on landscape and small screen (e.g. tablet)

[fix] Clicking on list item move the right icon (to the left), when an ink is enable

iOS support changes and mobile fixes

See merge request clients/cesium-grp/cesium!567

Changes for iOS 11 support (status bar), which includes update to Ionic 1.3.5, update of cordova-plugin-statusbar to 2.4.2. Also added NSCameraUsageDescription for iOS