GUI Touchup

!!ATTENTION!!
As of 07/11/21, due to some google script changes, the google reverse image search is no longer working. An updated version is coming soon, where this problem will be addressed.

--Changelog--
Add: show task progress at windows taskbar
Add: confirmation alert when exiting while running

Alt: finished tasks will remain on the table until a new one is added
Alt: the task table won't auto scroll horizontally
Alt: both dimensions must exceed the minimum in "more" subtasks
Alt: logs are only saved if tasks are running, ended or when exiting
Alt: "more" subtask sequence now starts at 0, not 1
Alt: image size is considered bigger than desired if it is also equal

Fix: failed tasks icon not being displayed
Fix: crashed tasks icon not being displayed
Fix: crash when trying to load a corrupted image
Fix: crash when google response doesn't have a location

Rev: "more" subtask "bigger size" log now displays desired size (source * ratio)
Rev: "larger" subtask log now displays desired dimension (source * ratio)
Rev: gui code review
Rev: task resources released after completion
Rev: some tooltips and log messages alterations
Rev: "google" tasks location header exception no longer logged
Rev: removed configuration file references from tooltips
Rev: "google" tasks loading log shows full file path
Rev: changed "large" subtask's folder name configuration key

Initial Release

!!ATTENTION!!
The default value used in the reverse search is in portuguese (PT-BR), please change it to your language in the configuration file generated after the first run.
Key: "google:link_text_marker"
Values: EN 'All sizes'; PT-BR 'Todos os tamanhos'; ES 'Todos los tamaños'; ... (google reverse search result link text)