[TOB-169] feat: Add error messages and extended error handling

 * Add utility rxjs operators for error handling
 * Add toast component and effect for displaying toast
 * Add actions and reducers for statement errors
 * Show error messages in details page
 * Show error messages in edit page
 * Show default error message for unexpected errors
 * Improve error handling in effects
 * Reorganize translations

[TOB-290] feat: Add authorization error handling for process tasks

 * Disable side menu buttons if task is claimed by another user
 * Hide side menu buttons if task can not be claimed at all

[TOB-188] feat: Select geographic position in workflow data form

 * Add leaflet configuration to package.json
 * Add styles for leaflet
 * Add rxjs operator for entering/leaving ngZone
 * Add wrapper directives for leaflet
 * Add select component for map coordinates
 * Submit geographic position in workflow form effect

[TOB-53] feat: Add email functionality

* A...