FEAT: added ability to toggle between selected languages

[ronniedroid]

What is it?

• Bugfix
• Feature
• Codebase improvement

Description of the changes in your PR

• Added a toggle languages button between the emoji key and the space bar (In all languages layouts)
• Removed the comma key (as we can reach the comma by long pressing the period key)
• Moved the select language secondary key (popup) to the newly added toggle languages key
• Made sure the icon of the key is visible in light and dark themes (by applying appropriate colors)
• Implemented the functionality to toggle between the languages

Before/After Screenshots/Screen Record

• After:

Acknowledgement

• I read the contribution guidelines.

[ronniedroid]

@naveensingh sorry I did not wait for the discussion to be resolved, I had some time to spare today and decided to put this here in case you would like to merge it before the first release. I added the toggle key at the bottom row, in case you want it in the toolbar instead of at the bottom row, let me know and I will move it there. best regards.

[Aga-C]

I think comma is a popular character, and we can't just remove its separate button. I haven't seen the keyboard without a comma button. Maybe you should do it similarly as it is in Gboard - emojis are moved to the comma long-press, so there's a place for language change button between comma and space bar.

[ronniedroid]

I think comma is a popular character, and we can't just remove its separate button. I haven't seen the keyboard without a comma button. Maybe you should do it similarly as it is in Gboard - emojis are moved to the comma long-press, so there's a place for language change button between comma and space bar.

The AOSP keyboard doesn't have a dedicated comma key, but your idea also sounds good, should I do that?

[Aga-C]

I don't know, you may try if you like. If I were you, I'd wait a bit, maybe Naveen will give his opinion soon.

[ronniedroid]

I just noticed that I have put the button to the left of the emoji key and not the right 😅, will fix later.

[naveensingh]

Closing because #25 (comment)