Clear timeline when there's holes between old and new

Closes #54

See merge request pleroma/pleroma-fe!171

Update icons to use base09 where appropriate, calculate base09 by averaging bg and text colors.

See merge request pleroma/pleroma-fe!174

Fix content sizing to not allow empty scrolling, make panel-switcher not grow on mobile

See merge request pleroma/pleroma-fe!175

Feature/configurable default path

See merge request pleroma/pleroma-fe!173

attempt to recognize when holes in timeline for various reasons, clear timeline and fetch older when showing new to get rid of holes

Various fixes with usercard (and attachments), clean up

See merge request pleroma/pleroma-fe!170

Hide unknown type attachments, polish the upload preview styling

See merge request pleroma/pleroma-fe!168

More style fixes

See merge request pleroma/pleroma-fe!167

Unhide completions, strengthen shadows a bit, force the 0.1 shade to always span the full height, make usercard use correct borders.

updated ger translation

See merge request pleroma/pleroma-fe!166

Customizable themes

Closes #41

See merge request pleroma/pleroma-fe!165

Move custom theming from settings to style-switcher, remove usage of custom .css files, use styles.json instead.

Update theme editor to have 4 colors, rewrite the color setter, change a LOT of base16 assignments for better consistency.

Fix timeline softlock when switching from a loading timeline

See merge request pleroma/pleroma-fe!164

Updated german translation

See merge request pleroma/pleroma-fe!163

Use state object for user view instead of timeline.

See merge request pleroma/pleroma-fe!161

Also fetch user if not in the state already.

Remove leading @ in user search.

Closes pleroma#71

See merge request pleroma/pleroma-fe!160

Unbreak reply navigation

See merge request pleroma/pleroma-fe!159