Add support to manage cross-signing and key backup (#461)

* Add useDeviceList hook

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add isCrossVerified func to matrixUtil

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add className prop in sidebar avatar comp

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add unverified session indicator in sidebar

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add info card component

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add css variables

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add cross signin status hook

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add hasCrossSigninAccountData function

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add cross signin info card in device manage component

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add cross signing and key backup component

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Fix typo

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* WIP

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add cross singing dialogs

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add cross signing set/reset

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add SecretStorageAccess component

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* Add key backup

Signed-off-by: Ajay Bura <ajbura@gmail.com>

* WIP

* WIP

* WIP

* WIP

* Show progress when restoring key backup

* Add SSSS and key backup

src/index.scss

@@ -69,9 +69,13 @@
   --ic-surface-high: #272727;
   --ic-surface-normal: #626262;
   --ic-surface-low: #7c7c7c;
+  --ic-primary-high: #ffffff;
   --ic-primary-normal: #ffffff;
+  --ic-positive-high: rgba(69, 184, 59);
   --ic-positive-normal: rgba(69, 184, 59, 80%);
+  --ic-caution-high: rgba(255, 179, 0);
   --ic-caution-normal: rgba(255, 179, 0, 80%);
+  --ic-danger-high: rgba(240, 71, 71);
   --ic-danger-normal: rgba(240, 71, 71, 0.7);
 
   /* user mxid colors */