This will require site.mk to explicitly pull in the gluon-setup-mode and
gluon-config-mode-core packages.

This commit splits gluon-config-mode into several, mostly independent
packages.

* gluon-config-mode-core: basic functionality (required)
* gluon-config-mode-hostname: hostname field
* gluon-config-mode-autoupdater: show when autoupdater is enabled
* gluon-config-mode-mesh-vpn: fastd vpn configuration, bw limit
* gluon-config-mode-geo-location: geo coordinates
* gluon-config-mode-contact-info: contact info field

The package gluon-config-mode has been removed. You need to replace
it with these packages (or any subset of them) in site.mk:

* gluon-config-mode-hostname
* gluon-config-mode-autoupdater
* gluon-config-mode-mesh-vpn
* gluon-config-mode-geo-location
* gluon-config-mode-contact-info

Note: It is not possible to deactivate the autoupdater in config mode
anymore (expert mode will still allow it). Instead, a message is shown
in case the autoupdater is enabled.

Previously, the config-mode was responsible for generating the fastd
secret. This patch sets the default secret to "generate" causing a
secret to be generated on its first use (e.g. show_key or start).

This also changes the info page (in Expert Mode) to show "n/a" when the
public key is not yet available.

gluon-config-mode retains the luci frontend, all setup scripts and config is
moved to the new package.

Various changes and moving stuff around.

Configmode should be exited by using the wizard instead.

This commit adds gluon-luci-core, a package both gluon-config-mode and
gluon-luci-admin will depend on. gluon-luci-core itself will depends on
gluon-luci-theme, gluon-core and most importantly luci-lib-web. It also
copies a few files from luci-mod-admin-core but leaves out everyting we
do not use.

At a later point I plan to move functionality from luci-lib-web into
this package, too. luci-lib-web contains most parts of luci including
hardcoded templates for CBI, which I intend to replace.

We'll have to revisit translations at a later point after configmode and
expertmode have matured. Texts in this package were pretty inconsistent
anyway so there is no point in keeping translations for random text
fragments.

Don't refresh the reboot page after rebooting the node. It's not going
back to configmode anyway so it'll never reload without user
intervention.

This completely replaces the text on the overview page. Consider this a
placeholder until someone writes a better suited version :)

Hide the "logout" button when in configmode.

Replaces double-spaces with tabs to match surrounding code.

For security reasons we'd like to disable all HTTP config interfaces
when the node is operating normally. This patch disables gluon-luci-admin
when configmode is not enabled.

This makes gluon-config-mode and gluon-luci-admin depend on
gluon-luci-theme instead of luci-theme-openwrt.