Timezone feature (#8185)

* Add supported timezones into config

Remove Timezone list creation in favor of timezone from configs

Add Timezone field to Users table

Clean up format of SupportedTimezones in config

* Remove unwanted change

* Add test for updating user timezone

* Add empty map[string]string if Timezone is null

* Add EnableTimezoneSelection config

* Revert back to map[string]string for ClientConfig

* Refactor SupportedTimezones into timezones.json

* Include timezones.json in TestConfigFlag

* Add timezone api endpoint

* Bump varchar size to 256 and setMaxSize in user_store

* Refactor LoadConfig to LoadConfig and LoadTimezoneConfig

* Remove unnecessary argument in LoadConfig, mail_test

* Add test for timezone endpoint

* Add license header

* Refactor timezones endpoint to system.go

* Add system base route to timezone endpoint

* db timezone upgrade in db v4.9

* Avoid saving SupportedTimezones to config.json

* Add timezonePath support in config

* Remove EnableTimezoneSelection from config

* Use return statement without return parameter

* Refactor test for SupportedTimezones

* Check for supportedTimezone != nil instead of using len

* Decouple SupportedTimezones out of Config

* Fix failing test

* Add LastTeamIconUpdate back in upgrade.go

* Write timezone config in config_flag_test

* Add code fallback for default timezone support

1 files changed, 12 insertions, 0 deletions

diff --git a/i18n/en.json b/i18n/en.json
index 42650a868..974334d85 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -3771,6 +3771,18 @@
     "translation": "This team has reached the maximum number of allowed accounts. Contact your systems administrator to set a higher limit."
   },
   {
+  "id": "app.timezones.failed_deserialize.app_error",
+  "translation": "Failed to deserialize Timezone config file={{.Filename}}, err={{.Error}}"
+  },
+  {
+    "id": "app.timezones.load_config.app_error",
+    "translation": "Timezone config file does not exists file={{.Filename}}"
+  },
+  {
+    "id": "app.timezones.read_config.app_error",
+    "translation": "Failed to read Timezone config file={{.Filename}}, err={{.Error}}"
+  },
+  {
     "id": "app.user_access_token.disabled",
     "translation": "Personal access tokens are disabled on this server. Please contact your system administrator for details."
   },