Dialogs causing HTMLCanvasElement memory leaks

[bitbof]

The following dialogs cause noticeable memory leaks, creating great amounts of canvas data that never gets garbage collected:

• Resize dialog
• Text Tool dialog
• Clipboard dialog

Could be connected to https://github.com/bitbof/klecks/issues/6

[bitbof]

Fixed a leak with https://github.com/bitbof/klecks/commit/be44d4723ea98cd0bd1ee6b48b2d36b6b8960fcc

Dialogs that still cause memory leaks (tested in Firefox, measuring before and after, and manually triggering GC each time):

• Manual Color Input fixed
• Layers > Rename fixed
• Text Tool fixed
• Edit > Transform fixed

[bitbof]

All fixed with

https://github.com/bitbof/klecks/commit/be44d4723ea98cd0bd1ee6b48b2d36b6b8960fcc https://github.com/bitbof/klecks/commit/0c25336972e92f8ffde7febd16d0b5f03fb12dc6 https://github.com/bitbof/klecks/commit/e9521cdbeca5de62669606beb153a60637a16b85 https://github.com/bitbof/klecks/commit/3412ed129f429f9fd0a5adb367e0f6fa0e9b0397