Merge pull request #125 from otiai10/develop

[sync master] 0.2.7.4
Merge pull request #128 from otiai10/refactor

Refactor
fix bug : initial achievement must be '0'
Merge pull request #129 from otiai10/develop

[sync master] 0.2.7.5
[sync] v0.2.7.5
tmp : fix bug on stg v0.2.7.5
fixbug: delayed adjusting windowsize
Interface for changing notification sound volume
[sync] 0.2.7.6
widget window tracking
Merge pull request #133 from otiai10/feature/position-tracking

widget window tracking
[sync] 0.2.7.7
Merge pull request #132 from otiai10/develop

[sync master] 0.2.7.7
fix: maintain window aspect ratio
Merge pull request #137 from about518/fix/window-aspect-ratio

fix: maintain window aspect ratio
allow free text input on manual reminder #134
Resize widget by launch button
Merge pull request #140 from about518/feature/resize-widget

Resize widget by launch button
Merge pull request #139 from otiai10/feature/free-text-in-manual

allow free text input on manual reminder #134
background-color: black #141