<!--- Provide a general summary of the issue in the Title above --> Every data type can be uploaded as user image (edit: correction in the issue: size is limited to 2 mb) ## Expected Behavior just image files with limited size can be uploaded ## Current Behavior every file can be uploaded ## Steps to Reproduce 1. open Upload new image dialog 2. drop a random big file 3. 4. ## Additional Information ### Possible Solution (optional) <!--- Not obligatory, but suggest a fix/reason for the bug, --> #### Context (optional) <!--- How has this issue affected you? What are you trying to accomplish? --> ### Detailed Description (optional) <!--- Provide a detailed description of the change or addition you are proposing --> ### Possible Implementation (optional) <!--- Not obligatory, but suggest an idea for implementing addition or change --> <!-- Adapted from https://raw.githubusercontent.com/stevemao/github-issue-templates/master/bugs-only/ISSUE_TEMPLATE.md -->