PAINTROID-775 Make the saving after tool change consistent for all tools

[khalid-nasralla]

PAINTROID-775

Behavior before:
When using Text-, Clipboard-, Image-, Shapes-Tools and not confirming/clicking on the checkmark to actually apply the Tool onto the canvas And then switching to another Tool, would still use the Tool regardless.

Behavior now:
When using Text-, Clipboard-, Image-, Shapes-Tools the user needs to confirm with the checkmark to apply it and it won't get applied automatically anymore when switching to another Tool.

I also changed the Clipboard behavior to function that way like the other tools hate have a checkmark for confirmation, because it wouldn't by default since it doesn't use a checkmark.

Added an Auto-Save functionality to the Advanced Settings of the Top-bar menu:

Disabled: Using one of the named Tools and switching to another Tool without confirming doesn't apply it.
Enabled: Using one of the named Tools and switching to another Tool without confirming still applies the Tool regardless and automatically saves it to the Canvas.

• Include the name of the Jira ticket in the PR’s title
• Include a summary of the changes plus the relevant context
• Choose the proper base branch (develop)
• Confirm that the changes follow the project’s coding guidelines
• Verify that the changes generate no compiler or linter warnings
• Perform a self-review of the changes
• Verify to commit no other files than the intentionally changed ones
• Include reasonable and readable tests verifying the added or changed behavior
• Confirm that new and existing unit tests pass locally
• Check that the commits’ message style matches the project’s guideline
• Stick to the project’s gitflow workflow
• Verify that your changes do not have any conflicts with the base branch
• After the PR, verify that all CI checks have passed
• Post a message in the #paintroid Slack channel and ask for a code reviewer

[Fenirok]

Which tools from Paintroid are not yet implemented in Flutter? @khalid-nasralla