Standardize capitalization on actions and short sentences [manage display]

This a subtask of issue 421118 for a complete history and links to the other subtasks see #421118: [Meta] Standardize capitalization on actions

Problem/Motivation

Lowercase action words are harder to translate. Many contributed modules, like Organic Groups and Views, already use uppercase action words.
To make this task better manageable we decided to split it on a module basis.

Proposed resolution

Change delete to Delete, configure to Configure, view to View, etc.

Remaining tasks

We need a patch for the "manage display" module