Some improvements to messages in app cells
Some improvements to messages in app cells

I just wanted to edit "You may edit the parameters for this App. All required parameters are not currently entered. When they are complete, you will be able to run the app" to make it clearer, but then I made a bunch of other very minor changes to other messages (capitalizing App, using periods consistently, etc.). Nothing major.
pranjan77/narrative,psnovichkov/narrative,msneddon/narrative,briehl/narrative,pranjan77/narrative,kbase/narrative,msneddon/narrative,msneddon/narrative,kbase/narrative,briehl/narrative,msneddon/narrative,msneddon/narrative,jmchandonia/narrative,psnovichkov/narrative,pranjan77/narrative,msneddon/narrative,jmchandonia/narrative,briehl/narrative,briehl/narrative,pranjan77/narrative,jmchandonia/narrative,kbase/narrative,pranjan77/narrative,psnovichkov/narrative,jmchandonia/narrative,pranjan77/narrative,jmchandonia/narrative,kbase/narrative,briehl/narrative,msneddon/narrative,psnovichkov/narrative,psnovichkov/narrative,briehl/narrative,psnovichkov/narrative,briehl/narrative,jmchandonia/narrative,kbase/narrative,psnovichkov/narrative,jmchandonia/narrative,pranjan77/narrative,kbase/narrative