Beautified Life Goal & Log Task Activities

- Changed alignments
- Deleted strings for Textedit fields
- Added strings for contentDescription of the Life Goal Options in
activity_log_task.xml
Fixes

- Fixed the problem with editing the description fields
- Deleted the following strings: task_title; task_title_edit;
task_desc; task_desc_edit
- Changed the strings goal_name, lbl_save_button
Bit more cleaning

- Simplified both activity_life_goal.xml and activity_log_task.xml
Merged Cleanup to Task+LifeGoal-Activities branch